Pipe Reducer

What is a pipe reducer?

A pipe reducer is a device that connects two pipes of different diameters. It’s often used to change the size of a pipe, allowing it to function properly with another pipe of a different size.

Reducers are also known as “step-downs” or “cones,” so you may hear these terms used interchangeably with reducers in conversation.

What are the different types of reducers?

If you’ve ever been tasked with connecting two pipes of different diameters, you know that it can be a real pain. That’s where pipe reducers come in: They’re designed to connect pipes of different sizes together so that they can be used as one continuous line. There are two main types of reducers—concentric and eccentric. In general terms, concentric reducers have an outer shell (aka “body”) with a smaller-diameter opening (aka “bore”) on the inside and an inner disk with a larger diameter opening that fits snugly over this smaller-diameter bore. Eccentric reducers are similar but constructed differently: The outer shell has an even larger diameter opening than its inner disk (typically), allowing for more cohesive connection between two pipes with slightly differing diameters than would otherwise be possible.

Concentric Reducers (CR)

Concentric reducers are used to transition between pipes of different diameters. The two ends of a concentric reducing pipe have nozzles with the center of the circle on the same axis. When changing the diameter, if the position of the pipe is calculated based on the axis, the position of the pipe remains unchanged. It is generally used for gas or vertical liquid pipeline diameter changing.

For an example, when 4″ pipe transitions to 2″ pipe, then the top or bottom of the pipe do not remain level. It is widely used when single or multiple diameter changes.

Where will I use a concentric reducer?

The two ends of a concentric reducing pipe have nozzles with the center of the circle on the same axis. When changing the diameter, if the position of the pipe is calculated based on the axis, the position of the pipe remains unchanged. It is generally used for gas or vertical liquid pipeline diameter changing. Concentric reducers benefit fluid flow and interfere less with fluid flow patterns during diameter reduction. Therefore, gas and vertically flowing liquid pipelines use concentric reducers for diameter reduction.

Eccentric Reducers (ER)

Eccentric reducers can use pipes or flanges with different diameters to change the diameter due to the different port diameters at both ends. When the tangent point of the pipe orifice is facing upwards, it is connected using a top mounted method, usually used at the inlet of the pump, which is beneficial for exhaust; When the cutting point of the pipe orifice is downward, a bottom installation is required, usually used for installing control valves and drainage.
Due to the flat side of the eccentric reducer, it is beneficial for exhaust or drainage, and is easy to start and maintain. The horizontal installation of liquid pipelines usually uses eccentric reducers.

Where will I use an eccentric reducer?

You can use an eccentric reducer to increase flow volume and pressure. For example, let’s say you’re using a pipe connection that has two straight pipes coming out of each other but not connecting together. The two pipes will not be able to connect because they’re all jammed up against each other so you need an eccentric reducer to help with this issue. You could also use an eccentric reducer if there is too much pressure in one area and too little pressure in another area of your system by using an eccentric reducer as well, which would allow for even distribution throughout the entire system.
Another common scenario where you would use an eccentric reducer is if there was no way for water or gas flow through a certain section of piping without creating turbulence or taking up valuable space inside that particular piece of hardware which means those types of pipes wouldn’t work well together anyway!

TF & BF

On an isometric view, in a horizontal line, with a eccentric reducer must be declared, or the flat side at the bottom or top must be assembled. Perhaps, you have ever seen on a drawing, the abbreviation “TF” or “BF”. This stands for respective “top flat” and “bottom flat”

For example..

1. Bottom flat eccentric reducer are often be used in pipe racks to keep the pipeline at the same elevation, after a pipe size change. When a concentric or a flat on top eccentric reducer in a pipe rack will be used, the support detail, probably change.
2. Top flat eccentric reducer are often be used in pump suction lines to avoid accumulation of gas pockets.Eccentric reducers can avoid small “dead spots” that exist behind concentric reducers.

Some draughtsmen also specify the size difference T between the center lines. As a eccentric reducer in a vertical line is used, it may also be important, which side should be oriented to the north, south, east or west.

Difference between eccentric reducer and concentric reducer

• Eccentric reducers are more commonly used than concentric reducers.
• Concentric reducers are used in piping systems where the pressure drop is more than the flow rate, whereas eccentric reducers are used when the flow rate is greater than the pressure drop in a system.
• The physical construction of an eccentric reducer is such that it allows for parallel offset alignment of two pipes which do not intersect each other at any point along their length, but instead come close or touch at one or two points (usually at right angles to each other).

It’s important to know the difference between the two types of pipe reducers, as they both have different applications. For example, if you need to join two pipes that are of different diameters and don’t want them to touch each other directly (e.g., because they might rust), then an eccentric reducer would be best. On the other hand, if you need to connect two pipes that are exactly the same size but just need some extra pressure on one end due to being further away from where they start off, then a concentric reducer would work best instead (e.g., if you want to connect two lengths of tube together).

Metal Material of Pipe Reducers

Metal materials used to make reducers are divided into two main groups: carbon steel and stainless steel. Carbon steel is the most common material used in reducer manufacturing, followed by stainless steel. Each type of reducer has its own advantages and disadvantages, however each one can be manufactured to meet all your requirements and specifications.
The material of construction is a vital factor when choosing an reducer. The quality of the material used to construct pipes plays a large role in the overall durability and lifespan of the pipe. High quality materials can be used to construct reducers which last longer and require less frequent replacement than their counterparts made from lower quality materials.

• Stainless Steel Reducer : ASTM A403 WP Gr. 304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L.
• Carbon Steel Reducer : ASTM A 234 WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
  
• Low Temperature Carbon Steel Reducer : ASTM A420 WPL3, A420 WPL6.
  
• Alloy Steel Reducer : ASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91.
  
• Duplex Steel Reducer : ASTM A 815, ASME SA 815 UNS NO S31803, S32205. Werkstoff No. 1.4462.

• Titanium Alloy Reducer : ASTM B363 WPT2, WPT3, WPT7, WPT9, WPT11

• Nickel Alloy Reducer : ASTM / ASME SB 336 UNS 2200 ( NICKEL 200 ), UNS 2201 (NICKEL 201 ), UNS 4400 (MONEL 400 ), UNS 8020 ( ALLOY 20 / 20 CB 3, UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600 ), UNS 6601 ( INCONEL 601 ), UNS 6625 (INCONEL 625), UNS 10276 ( HASTELLOY C 276).
• Copper Alloy Reducer: ASTM / ASME SB 111 UNS NO. C 10100 , C 10200 , C 10300 , C 10800 , C 12000, C 12200, C 70600 C 71500, ASTM / ASME SB 466 UNS NO. C 70600 ( CU -NI- 90/10) , C 71500 ( CU -NI- 70/30)

Pipe reducers are used to transition between pipes of different diameters.

Pipe reducers are used to transition between pipes of different diameters. There are many different types of pipe reducers available, each with its own set of characteristics. Some types of pipe reducers are smaller in size than others, or may include additional features such as a flange for joining two pipes together.

In addition to the wide variety of sizes and styles available, pipe reducers can be made from various materials including aluminum, steel and zinc-coated carbon steel.

Wall Thickness of Pipe Reducers

Pipe reducers are often used in commercial and industrial applications to reduce the length of a pipe without affecting its diameter. This can be used for many different reasons, including reducing the amount of material needed to complete a project or making it easier to transport equipment through tight spaces. It also helps ensure that your pipes can withstand the pressure they will be exposed to during operation because the walls are thicker than standard pipes.

Pipe reducers can play an important role in reducing the length of pipe when you need to change pipe sizes.

Pipe reducers are devices that help you reduce the length of pipe when you need to change pipe sizes. They do not affect the diameter of the pipe, so they can be used in a wide range of applications.

Pipe reducers are available in both standard and custom specifications, depending on your specific needs. If you’re looking for a great selection of pipe reducers at an affordable price, we’ve got what you need!

Because of their design, they cannot be used to reduce the diameter of the pipe.

Pipe reducers can be used to reduce the length of pipe, but they cannot be used to reduce the diameter of pipe.

Pipes are reduced in length by a certain amount, but the diameter remains unchanged. Pipe reducers cannot be used to reduce the diameter of pipe.

If you want to reduce the diameter of your pipes, you will need a different fitting called an “end cap” or “bushing”.

Pipe reducers are used in a wide range of applications, and we provide them in both standard and custom specifications, depending on the project.

You can find pipe reducers at just about any hardware store or home improvement store. If you’re looking for specific sizes or features, our team of experts can help you find exactly what you need.

The wall thickness of pipe reducers is determined in terms of schedule (e.g., 40S/40 STD) or by nominal wall thickness (e.g., 3/4”). The latter is sometimes called standard wall thickness because it is the most common type of pipe reducer.

For example, let’s say you need to install a 1-inch pipe through a 6-inch concrete floor slab, and the pipes are made from schedule 40 steel (which has a nominal wall thickness of .065 inch). You can determine how much space to leave between the floor and your new pipes by multiplying that length with the difference between their diameters: 1 x 6 = 6 inches. The distance between these two surfaces should be at least six times greater than their combined diameters—that’s how thick your concrete slab needs to be!

The wall thickness is fixed and not adjustable, based on different standards.

The wall thickness is fixed and not adjustable, based on different standards. It is determined by the pipe size and the pipe schedule. The nominal wall thickness of Schedule 10 pipes with a diameter of 600mm or less is set to:

• 1/4 inch for NPS 2 (1/2″) through 4 (3/4″)

• 3/8 inch for NPS 6 (1″), 8 (1-1/4″), 10 (1-1/2″), and 12 (2″).

Whether you need to replace an old pipe reducer or install a new one, it’s important to know the wall thickness of your pipe reducer. By knowing this information, you can ensure that it will be compatible with your project and meet your requirements. If not, consider working with a professional who can help find the right product for your needs!

Manufacturing standard of pipe reducer

Japanese Standards

• JIS B2311 General purpose steel butt welded pipe fittings
• JIS B2312 Steel Butt Welding Pipe Fittings
• JIS B2313 Steel Plate Butt Welding Pipe Fittings
• JIS B2316 Steel Socket Welding Pipe Fittings

American Standards

• ASME/ANSI B16.9 Factory Made Wrought Steel Butt Welding Fittings
• ASME/ANSI B16.11 Forged Fittings, Socket Welding and Threaded
• ASME/ANSI B16.28 Steel Butt Welding Small Radius Reducer and Turnback Bend
• ASME B16.5 Pipe Flanges and Flanged Fittings
• MSS SP-43 Forged Stainless Steel Butt Welding Pipe Fittings
• MSS SP-79 Socket Weld Reducing Inserts
• MSS SP-83 Socket Welding and Threaded Union
• MSS SP-97 Integral Reinforced Socket, Threaded and Butt Welding Ends

Chinese Standards

• HGJ514 Carbon Steel, Low Alloy Steel Seamless Butt Welding Pipe Fittings
• HGJ528 steel butt welded pipe fittings
• HGJ10 forged steel socket welding pipe fittings
• HGJ529 Forged steel socket welding, threaded and butt welding pipe stand
• HGJ-44-76-91 Steel Pipe Flange, Gasket and Fastener
• HG20592-20635 Steel Pipe Flange, Gasket and Fastener

Manufacturing processes of pipe reducers

How are reducers manufactured? The manufacturing of reducer is divided into the manufacturing of seamless reducer and the manufacturing of welded reducer.

The pipe reducer is a component that reduces the diameter of the pipeline. It is mainly used in pipelines with different diameters to meet the requirements of engineering projects. Reducers are manufactured according to different standards, so the pipe reducers produced have different specifications, shapes and sizes. In general, seamless reducers are used for nominal diameters above DN200, and welded pipe reducers can be used for nominal diameters below DN200. There are many kinds of pipe fittings in engineering construction. Among them, the most common is the material of stainless steel reducer, which is made of stainless steel material and has excellent corrosion resistance. Stainless steel reducer has good property and high strength after raising temperature state. It has stable product performance under pressure and temperature changes, so it is widely used in construction projects such as water supply engineering and drainage system pipes.”

Manufacturing method of pipe reducer

The manufacturing method of pipe reducer, as the name suggests, is to reduce the diameter of the pipeline. It can be widely used in pipelines with different diameters to meet the requirements of engineering projects.

The sizes available include:

• DN200-DN800;

• DN50-DN600;

Reducers are manufactured according to different standards, so the pipe reducers produced have different specifications, shapes and sizes. In general, seamless reducers are used for nominal diameters above DN200, and welded pipe reducers can be used for nominal diameters below DN200. There are many kinds of pipe fittings in engineering construction. Among them, the most common is the material of stainless steel reducer, which is made of stainless steel material and has excellent corrosion resistance. Stainless steel reducer has good property and high strength after raising temperature state. It has stable product performance under pressure and temperature changes, so it is widely used in construction projects such as water supply engineering and drainage system pipes.

Manufacturing process of seamless reducer

In the production process of seamless pipe reducer, there are many processes such as hot rolling process, forging process and bending molding. Seamless pipe reducer is one of the most important parts in the oil and gas industry. Therefore, it should have high strength and good corrosion resistance ability.

Hot rolling process of seamless pipe reducer

The hot rolling process of the seamless pipe reducer is as follows:

• The first step is to use a hydraulic press to extrude the workpiece into a certain shape. The main purpose of this process is to make sure that there are no defects on the surface of the plastic material after it has been shaped by annealing, cold rolling and other processes.

• After finishing this step, you need to heat up your alloy steel and roll it again with high pressure in order to produce pipes with different diameters.

• You should then place your pipe into annealing ovens so that they will cool down slowly and evenly under low temperatures (about 100 degrees Celsius) for several hours or even days until their entire surface is cooled down completely after being heated up before being processed by cold rolling machines or other machinery used for manufacturing seamless pipes

Forging process of seamless pipe reducer

Forging is a process of forming metal by plastic deformation. It is a hot working process, which is performed at temperatures above the recrystallization temperature of the material and below its melting point. Forging operations can be divided into two categories:

• Closed die forging: The metal piece to be forged enters the die cavity through an opening in one end and exits through an opening at the other end; both openings are closed by dies or punch faces. The blank may pass through several sets of dies before exiting as finished parts. This type of blanking operation requires greater force than open-die forging to compensate for friction between punches and dies that tend to wear out tools faster than open-die machines do

Bending molding of seamless pipe reducer

Bending molding of seamless pipe reducer is a process that uses a large-scale press with an external mold to reduce the diameter of seamless pipes.

It is widely used in steel industry, building materials, machinery manufacturing and other industries. Bending molding can be divided into single bending machine and multi-hole bending machine according to the number of molds used in one press; single hole and double hole according to the number of holes on each mold; linear guide rail fixed type or cantilever beam fixed type according as whether there is a support structure for guiding rails or not.

Reducer Cold Formng

Manufacturing method of welded reducer

Welded pipe reducer is also known as welded polygonal pipe reducer, which is made by rolling up a polygonal block and welding it into a circular shell. The main purpose of welded pipe reducer is to reduce water and steam pipes or medical catheter diameter in order to gradually reduce flow capacity or divert flow direction change.

Welded pipe reducer forming process, mainly including material preparation, molding, heat treatment and finishing section.

Welded pipe reducers are manufactured by the steel plate manufacturer. The first step is to prepare the material for welding. The second step is to mold it into a desired shape, and then heat treatment and surface finishing are performed on it.

Here are some details about this process:

• Material preparation: When preparing materials for welding, you will need to consider several factors including hardness, toughness, toughness and so on.

The production process of welded pipe reducer is based on the method of cold pushing, which is to assemble a suitable number of convex blocks in the molding box and make them into a regular polygon.

The basic principle is as follows: when you press a convex block firmly on both sides, it will be pressed into a pyramidal shape; if you want to form other shapes such as octahedron, it should be pressed from both sides at once.

It is called a polygonal segment. Around the axis of the reducer, several polygonal segments are placed side by side and rolled together to form a round shell. The shape is called a polygonal segment. Around the axis of the reducer, several polygonal segments are placed side by side and rolled together to form a round shell.

The shape has an even number of sides (typically six). It’s also called “triangular” or “hexagonal”, but it really doesn’t matter what you call it as long as you know what we mean when we say “polygonal”.

The polygonal shape has good quality after rolling and welding because of its regularity; therefore, it can get good mechanical properties such as tensile strength and elongation at break point.

The length of construction period depends on the material quality and size of the reducer. The larger the reducer, the longer it takes to produce. According to this rule, it is possible to estimate that a product with an internal diameter of 12 inches will take about six hours and 15 minutes to manufacture.

The polygonal segment has good quality after rolling and welding. After heat treatment, it can get good mechanical properties and meet the use requirements.

The welding quality of a welded pipe reducer is the main factor affecting the mechanical properties of the welded pipe reducer. The welding site has a complex structure, and there are many welding spots. Therefore, when designing and manufacturing welded pipe reducers, due consideration should be given to the selection of welding methods for different parts and positions.

The process of welding can be roughly divided into three types: butt-welding method, lap-welding method, T joint (or tee joint) method. In general use cases in practice, most manufacturers select heavy machinery manufacturers use T joint (or tee joint) method because this technology has high efficiency, fast speed and good quality control etc..

The main purpose of welded pipe reducer is to reduce water and steam pipes or medical catheter diameter in order to gradually reduce flow capacity or divert flow direction change.

Reducing pipe diameters:

Welded reducers are used when the diameter of the pipeline must be reduced, such as reducing a 100 mm pipeline with a 70 mm pump connection. The reduction ratio can be calculated by dividing the smaller reduction rate by larger reduction rate:

• `(70-100)/(70/100)=0.714`

Blueprints for welded pipe reducers must meet certain requirements before they can be manufactured.

Reducer Welding

Inspection of Pipe Reducer

The inspection part includes hydrostatic test with water pressure or pressure test after airtight test with gas pressure. Non-destructive testing such as X-ray test or ultrasonic inspection (NDT), Magnetic particle inspection of inner surface or outer surface (MT) or metallographic examination.

Connection Types of Pipe Reducer

There are four common types of pipe reducers—welding steel pipe reducers, flanged steel pipe reducers, Socket weld reducer and threaded steel pipe reducers—with each having specific advantages based on what type of job you need to be done:
Welding steel pipe reducer.
A welding steel pipe reducer is used to connect two pipes of different sizes. It can be used in oil and gas pipelines. It’s made of mild or stainless steel, which makes it corrosion-resistant.
Flanged steel pipe reducer.
Flanged steel pipe reducers are used to connect sections of a water or sewage system. They are available in various sizes and materials, including carbon steel, stainless steel, and galvanized.
The flanges on a flanged pipe reducer serve several functions. First, they allow the pipe reducer to be bolted together for ease of installation and maintenance. Second, they help protect the joint from damage caused by corrosion or mechanical impact (such as being bumped). Thirdly, they allow for easy attachment to other equipment such as valves or pumps through various connections (e.g., threaded fittings).
Threaded steel pipe reducer.
A threaded steel pipe reducer is a round fitting that is used for joining two pipes of different sizes. It has a threaded connection, which allows you to connect them without the use of any other tools or connectors. These fittings are usually made from materials such as steel and brass, but some high-end fittings may be made from stainless steel or carbon steel instead. They are commonly used in pipelines that need to be joined together at the same time, such as oil and gas pipelines, petrochemical pipelines, and food processing lines.

Socket weld reducer.

Socket welding (SW) reducer are used to permanently join pipes that are inserted into a recess in the fitting, flange or valve. Once correctly inserted, fillet type sealing welds are applied to join the pipe to the fitting.

How do you calculate reducer pipe length?

How do I know my reducer length? The length of a Reducer is very short in relation to the diameter, so in some dimensions the transition from one to another diameter is very abruptly. For example, a reducer NPS 6 – NPS 2.1/2 has a length of 140 mm. On this short distance a pipeline will be reduced from 168.3 mm O.D. to 73 mm O.D. During the design phase of a new pipe system, a piping designer certainly must think about it.

An alternative for a smoother flow would be to apply multiple reducers like..

• NPS 6 – NPS 5 (L=140 mm)
• NPS 5 – NPS 4 (L=127 mm)
• NPS 4 – NPS 3.1/2 (L=102 mm)
• NPS 3.1/2 – NPS 3 (L=102 mm)
• NPS 3 – NPS 2.1/2 (L=102 mm)

So, now the distance is approximately 573 mm if the NPS 6 pipe is reduced to NPS 2.1/2, and a smoother flow is guaranteed. In practice this example will probably never occur, I hope, I’m sure, there are better designers like me.

Dimension of Butt Weld Reducers

How do I know my reducer size?  How do I determine the size of the reducer to use?

The size of the reducer is determined by the inside diameter (ID) of the pipe and outside diameter (OD). In other words, if you have a 1/2″ ID on your main line and need to reduce down to 3/8″, you will need a 3/8″ x 1/2″ reducing bushing. If your main line has an OD of 4″, however, you can use any size pipe up to 4″.

Concentric and Eccentric Reducers ASME B16.9

NPS	O.D. D	O.D. D1	Length H
3/4 – 1/2	26.7	21.3	38
1 – 1/2	33.4	21.3	51
1 – 3/4	33.4	26.7	51
1.1/4 – 1/2	42.2	21.3	51
1.1/4 – 3/4	42.2	26.7	51
1.1/4 – 1	42.2	33.4	51
1.1/2 – 1/2	48.3	21.3	64
1.1/2 – 3/4	48.3	26.7	64
1.1/2 – 1	48.3	33.4	64
1.1/2 – 1.1/4	48.3	42.2	64
2 – 3/4	60.3	26.7	76
2 – 1	60.3	33.4	76
2 – 1.1/4	60.3	42.2	76
2 – 1.1/2	60.3	48.3	76
2.1/2 – 1	73	33.4	89
2.1/2 – 1.1/4	73	42.2	89
2.1/2 – 1.1/2	73	48.3	89
2.1/2 – 2	73	60.3	89
3 – 1.1/4	88.9	42.2	89
3 – 1.1/2	88.9	48.3	89
3 – 2	88.9	60.3	89
3 – 2.1/2	88.9	73	89
3.1/2 – 1.1/4	101.6	42.2	102
3.1/2 – 1.1/2	101.6	48.3	102
3.1/2 – 2	101.6	60.3	102
3.1/2 – 2.1/2	101.6	73	102
3.1/2 – 3	101.6	88.9	102
4 – 1.1/2	114.3	48.3	102
4 – 2	114.3	60.3	102
4 – 2.1/2	114.3	73	102
4 – 3	114.3	88.9	102
4 – 3.1/2	114.3	101.6	102
5 – 2	141.3	60.3	127
5 – 2.1/2	141.3	73	127
5 – 3	141.3	88.9	127
5 – 3.1/2	141.3	101.6	127
5 – 4	141.3	114.3	127
6 – 2.1/2	168.3	73	140
6 – 3	168.3	88.9	140
6 – 3.1/2	168.3	101.6	140
6 – 4	168.3	114.3	140
6 – 5	168.3	141.3	140
8 – 3.1/2	219.1	101.6	152
8 – 4	219.1	114.3	152
8 – 5	219.1	141.3	152
8 – 6	219.1	168.3	152
10 – 4	273	114.3	178
10 – 5	273	141.3	178
10 – 6	273	168.3	178
10 – 8	273	219.1	178
12 – 5	323.9	141.3	203
12 – 6	323.9	168.3	203
12 – 8	323.9	219.1	203
12 – 10	323.9	273	203
14 – 6	355.6	168.3	330
14 – 8	355.6	219.1	330
14 – 10	355.6	273	330
14 – 12	355.6	323.9	330
16 – 8	406.4	219	356
16 – 10	406.4	273	356
16 – 12	406.4	323.9	356
16 – 14	406.4	355.6	356
18 – 10	457	273	381
18 – 12	457	323.9	381
18 – 14	457	355.6	381
18 – 16	457	406.4	381
20 – 12	508	323.9	508
20 – 14	508	355.6	508
20 – 16	508	406.4	508
20 – 18	508	457	508
22 – 14	559	355.6	508
22 – 16	559	406.4	508
22 – 18	559	457	508
22 – 20	559	508	508
24 – 16	610	406.4	508
24 – 18	610	457	508
24 – 20	610	508	508
24 – 22	610	559	508
26 – 18	660	457	610
26 – 20	660	508	610
26 – 22	660	559	610
26 – 24	660	610	610
28 – 18	711	457	610
28 – 20	711	508	610
28 – 24	711	610	610
28 – 26	711	660	610
30 – 20	762	508	610
30 – 24	762	610	610
30 – 26	762	660	610
30 – 28	762	711	610
32 – 24	813	610	610
32 – 26	813	660	610
32 – 28	813	711	610
32 – 30	813	762	610
34 – 24	864	610	610
34 – 26	864	660	610
34 – 30	864	762	610
34 – 32	864	813	610
36 – 24	914	610	610
36 – 26	914	660	610
36 – 30	914	762	610
36 – 32	914	813	610
36 – 34	914	864	610
38 – 26	965	660	610
38 – 28	965	711	610
38 – 30	965	762	610
38 – 32	965	813	610
38 – 34	965	864	610
38 – 36	965	914	610
40 – 30	1016	762	610
40 – 32	1016	813	610
40 – 34	1016	864	610
40 – 36	1016	914	610
40 – 38	1016	965	610

Dimensions are in millimeters unless otherwise indicated. Wall thickness (t) must be specified by customer.

Dimensional Tolerances of Concentric and Eccentric Reducers ASME B16.9

Nominal Pipe Size	1/2 to 2.1/2	3 to 3.1/2	4	5 to 8
Outside Diameter at Bevel (D)	+ 1.6 – 0.8	1.6	1.6	+ 2.4 – 1.6
Inside Diameter at End	0.8	1.6	1.6	1.6
Overall Length (H)	2	2	2	2
Nominal Pipe Size	10 to 18	20 to 24	26 to 30	32 to 48
Outside Diameter at Bevel (D)	+ 4 – 3.2	+ 6.4 – 4.8	+ 6.4 – 4.8	+ 6.4 – 4.8
Inside Diameter at End	3.2	4.8	+ 6.4 – 4.8	+ 6.4 – 4.8
Overall Length (H)	2	2	5	5
Wall Thickness (t)	Not less than 87.5% of Nominal Wall Thickness

Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.

Note..
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.

Weights of Butt Weld Reducers Concentric & Eccentric

Pipe Reducer Weight Calculation Formula
The steel pipe reducer weight formula is 0.02466 * S {(D+d)/2 – S} * H/1000

• D = Large end diameter in mm.
• d = Small end diameter in mm.
• S = Large end Thickness in mm.
• H = Height from end to end.

If we want to calculate the weight by formula, we need to know above 4 factors. Where can you get them? Usually we get the them from pipe reducer dimensions.

WALL THICKNESSES SCHEDULE STD

NPS	LBS	KG
3/4-1/2	0.17	0.08
3/4-3/8	0.15	0.07
1-3/4	0.4	0.18
1-1/2	0.4	0.18
1.1/4-1	0.5	0.23
1.1/4-3/4	0.4	0.18
1.1/4-1/2	0.4	0.18
1.1/2-1.1/4	0.7	0.32
1.1/2-1	0.62	0.28
1.1/2-3/4	0.54	0.24
1.1/2-1/2	0.5	0.23
2-1.1/2	0.9	0.41
2-1.1/4	0.84	0.38
2-1	0.76	0.34
2-3/4	0.7	0.32
2.1/2-2	1.5	0.68
2.1/2-1.1/2	1.38	0.63
2.1/2-1.1/4	1.25	0.57
2.1/2-1	1.25	0.57
3-2.1/2	2	0.91
3-2	1.8	0.82
3-1.1/2	1.7	0.77
3-1.1/4	1.6	0.73
3.1/2-3	3.15	1.43
3.1/2-2.1/2	2.88	1.31
3.1/2-2	2.75	1.25
3.1/2-1.1/2	2.5	1.13
3.1/2-1.1/4	2.4	1.09
4-3.1/2	3.5	1.59
4-3	3.38	1.53
4-2.1/2	3.25	1.47
4-2	3	1.36
4-1.1/2	2.88	1.31
5-4	6	2.72
5-3.1/2	5.75	2.61
5-3	5.5	2.49
5-2.1/2	5.25	2.38
5-2	5	2.27
6-5	8.5	3.86
6-4	8.25	3.74
6-3.1/2	8.25	3.74
6-3	8	3.63
6-2.1/2	7.25	3.29
8-6	13.2	5.99
8-5	12	5.44
8-4	11	4.99
8-3.1/2	11	4.99
10-8	22	9.98
10-6	21.5	9.75
10-5	21	9.53
10-4	20	9.07
12-10	34	15.42
12-8	32	14.51
12-6	31	14.06
12-5	30	13.61
14-12	60	27.22
14-10	59.2	26.85
14-8	58.5	26.54
14-6	58	26.31
16-14	71	32.21
16-12	70	31.75
16-10	69.5	31.52
16-8	68.5	31.07
16-6	–	–
18-16	85	38.56
18-14	84	38.1
18-12	83	37.65
18-10	82	37.19
18-8	–	–
20-18	125	56.7
20-16	124	56.25
20-14	122	55.34
20-12	120	54.43
20-10	–	–
20-8	–	–
22-20	142	64.41
22-18	138	62.6
22-16	131	59.42
22-14	123	55.79
22-12	–	–
22-10	–	–
24-22	–	–
24-20	150	68.04
24-18	148	67.13
24-16	145	65.77
24-14	–	–
24-12	–	–
24-10	–	–
26-24	207	93.89
26-22	200	90.72
26-20	190	86.18
26-18	182	82.55
26-16	–	–
26-14	–	–
26-12	–	–
28-26	224	101.6
28-24	216	97.98
28-22	210	95.25
28-20	199	90.26
30-28	241	109.32
30-26	232	105.23
30-24	224	101.6
30-22	220	99.79
30-20	220	99.79

WALL THICKNESSES SCHEDULE XS

NPS	LBS	KG
3/4-1/2	0.22	0.1
3/4-3/8	0.2	0.09
1-3/4	0.45	0.2
1-1/2	0.45	0.2
1.1/4-1	0.5	0.23
1.1/4-3/4	0.5	0.23
1.1/4-1/2	0.5	0.23
1.1/2-1.1/4	0.78	0.35
1.1/2-1	0.75	0.34
1.1/2-3/4	0.7	0.32
1.1/2-1/2	0.65	0.29
2-1.1/2	1.2	0.54
2-1.1/4	1.15	0.52
2-1	1.1	0.5
2-3/4	1	0.45
2.1/2-2	2	0.91
2.1/2-1.1/2	1.9	0.86
2.1/2-1.1/4	1.85	0.84
2.1/2-1	1.75	0.79
3-2.1/2	2.75	1.25
3-2	2.6	1.18
3-1.1/2	2.5	1.13
3-1.1/4	2.4	1.09
3.1/2-3	4	1.81
3.1/2-2.1/2	3.5	1.59
3.1/2-2	3.5	1.59
3.1/2-1.1/2	3.25	1.47
3.1/2-1.1/4	3.25	1.47
4-3.1/2	4.75	2.15
4-3	4.5	2.04
4-2.1/2	4.38	1.99
4-2	4.25	1.93
4-1.1/2	4	1.81
5-4	8.25	3.74
5-3.1/2	7.75	3.52
5-3	7.5	3.4
5-2.1/2	7	3.18
5-2	6.5	2.95
6-5	12	5.44
6-4	11.5	5.22
6-3.1/2	11	4.99
6-3	10.5	4.76
6-2.1/2	10	4.54
8-6	18.7	8.48
8-5	18	8.16
8-4	17	7.71
8-3.1/2	16.5	7.48
10-8	29.5	13.38
10-6	29.5	13.38
10-5	28	12.7
10-4	25.5	11.57
12-10	43.5	19.73
12-8	42	19.05
12-6	40	18.14
12-5	39	17.69
14-12	80	36.29
14-10	79.2	35.92
14-8	78.5	35.61
14-6	78	35.38
16-14	91	41.28
16-12	90	40.82
16-10	89	40.37
16-8	88.5	40.14
16-6	–	–
18-16	115	52.16
18-14	114	51.71
18-12	113	51.26
18-10	112	50.8
18-8	–	–
20-18	170	77.11
20-16	169	76.66
20-14	168	76.2
20-12	167	75.75
20-10	–	–
20-8	–	–
22-20	186	84.37
22-18	182	82.55
22-16	173	78.47
22-14	163	73.94
22-12	–	–
22-10	–	–
24-22	–	–
24-20	200	90.72
24-18	195	88.45
24-16	190	86.18
24-14	–	–
24-12	–	–
24-10	–	–
26-24	276	125.19
26-22	272	123.38
26-20	253	114.76
26-18	242	109.77
26-16	–	–
26-14	–	–
26-12	–	–
28-26	299	135.62
28-24	288	130.63
28-22	250	113.4
28-20	264	119.75
30-28	322	146.06
30-26	310	140.61
30-24	299	135.62
30-22	285	129.27
30-20	274	124.28

WALL THICKNESSES SCHEDULE 160

NPS	LBS	KG
3/4-1/2	0.28	0.13
3/4-3/8	0.24	0.11
1-3/4	0.5	0.23
1-1/2	0.5	0.23
1.1/4-1	0.65	0.29
1.1/4-3/4	0.65	0.29
1.1/4-1/2	0.6	0.27
1.1/2-1.1/4	0.95	0.43
1.1/2-1	0.8	0.36
1.1/2-3/4	0.75	0.34
1.1/2-1/2	0.73	0.33
2-1.1/2	1.6	0.73
2-1.1/4	1.5	0.68
2-1	1.5	0.68
2-3/4	1.45	0.66
2.1/2-2	2.5	1.13
2.1/2-1.1/2	2.25	1.02
2.1/2-1.1/4	2.25	1.02
2.1/2-1	2.2	1
3-2.1/2	3.7	1.68
3-2	3.4	1.54
3-1.1/2	3.2	1.45
3-1.1/4	3.1	1.41
3.1/2-3	–	–
3.1/2-2.1/2	–	–
3.1/2-2	–	–
3.1/2-1.1/2	–	–
3.1/2-1.1/4	–	–
4-3.1/2	–	–
4-3	6.4	2.9
4-2.1/2	5.5	2.49
4-2	5.4	2.45
4-1.1/2	5.25	2.38
5-4	12.5	5.67
5-3.1/2	–	–
5-3	11	4.99
5-2.1/2	10.5	4.76
5-2	10	4.54
6-5	18.75	8.5
6-4	16.5	7.48
6-3.1/2	–	–
6-3	15.5	7.03
6-2.1/2	15	6.8
8-6	31	14.06
8-5	27.2	12.34
8-4	23.5	10.66
8-3.1/2	–	–
10-8	57.5	26.08
10-6	54	24.49
10-5	52	23.59
10-4	50	22.68
12-10	96	43.54
12-8	87	39.46
12-6	83	37.65
12-5	80	36.29

WALL THICKNESSES SCHEDULE XXS

NPS	LBS	KG
1-3/4	0.8	0.36
1-1/2	0.75	0.34
1.1/4-1	1	0.45
1.1/4-3/4	1	0.45
1.1/4-1/2	1	0.45
1.1/2-1.1/4	1.5	0.68
1.1/2-1	1.5	0.68
1.1/2-3/4	1.38	0.63
1.1/2-1/2	1.25	0.57
2-1.1/2	2.38	1.08
2-1.1/4	2.25	1.02
2-1	2.15	0.98
2-3/4	2	0.91
2.1/2-2	4	1.81
2.1/2-1.1/2	3.9	1.77
2.1/2-1.1/4	3.6	1.63
2.1/2-1	3.5	1.59
3-2.1/2	6	2.72
3-2	5	2.27
3-1.1/2	4.9	2.22
3-1.1/4	4.75	2.15
3.1/2-3	8	3.63
3.1/2-2.1/2	8	3.63
3.1/2-2	7	3.18
3.1/2-1.1/2	7	3.18
3.1/2-1.1/4	7	3.18
4-3.1/2	9	4.08
4-3	9	4.08
4-2.1/2	8.5	3.86
4-2	8.25	3.74
4-1.1/2	8	3.63
5-4	16	7.26
5-3.1/2	15	6.8
5-3	14.5	6.58
5-2.1/2	13.75	6.24
5-2	14	6.35
6-5	23	10.43
6-4	22	9.98
6-3.1/2	21	9.53
6-3	20	9.07
6-2.1/2	19	8.62
8-6	36	16.33
8-5	35	15.88
8-4	33	14.97
8-3.1/2	32	14.51

Note..
All weights are in pounds and kilograms and approximated or estimated.
Buttweld Fitting Weights
ASME buttweld fitting specifications do not specify weights for fittings. Weights quoted in the tables on this page are based on manufacturers information and should be considered as approximate and provided as a guide only (fitting weights can vary considerably between manufacturers due to differences in construction).
Weights in these tables are taken from Werner Sölken.

Installation of Steel Reducer

The installation of a steel reducer is an important process in the construction, and it should be done carefully. The steel reducer ensures that the fluid pressure doesn’t exceed the maximum allowable value and that there’s no leakage along the pipeline when it is installed.

Don’t use the reducer when the fluid temperature is above 60°C.

You should not use the reducer when the fluid temperature is above 60°C. The reducer can be damaged by high temperatures, high pressures and chemicals. If used in these situations, it may fail to operate in a safe manner and could cause serious personal injury or damage to property.

Connect the pipe fittings with the reducer after cutting the pipe end to make it smooth and without burr.

Use a pipe cutter to cut the pipe and make sure it is smooth. Don’t leave any burrs on the pipe. Don’t use a hacksaw to cut the pipe, as this will create an uneven cut which can cause leaks in your system.

The pipe fittings should be inspected with the reducer for leaks when installed, otherwise it will damage the reducer.

• Inspect the pipe fittings for leaks.

• If you find a leak, replace the reducer with a new one.

Butter can’t be used for connector installation of stainless steel reducer.

Don’t use butter for installing connectors on stainless steel reducer pipes. Instead, opt for pipe tape or other connector installation methods.

If you’re trying to install your own stainless steel reducer, there are a few things that you should keep in mind. First of all, if the pipe is already connected and has a connector on it already, make sure that it’s connected properly before removing it again. If it isn’t, there may be damage done to the threads inside of the threads on your reducer when you pull them apart. This could lead to leaks and damage later on down the road that would require replacement parts rather than just replacing a simple connector like we’ve shown here today with our example using Teflon tape which works great because its made especially well designed specifically designed not only prevents corrosion but also helps prevent leaks by sealing out any unwanted moisture from getting inside of where they’re supposed.

Applications of Steel Reducer

Steel reducers are widely used in different industries such as petrochemical industry, chemical industry, power plant industry and water supply systems. The main uses of steel reducer include pipeline construction and transportation which are applied to oil refining process and transportation of oil products; boiler project and nuclear power plant project for high pressure water pump; petroleum refinery for reducing diameter of oil pipe.

• The most common use is the petrochemical industry, where it is used to transport oil and gas products. Steel reducers are also commonly used in chemical plants to transport chemicals between reactors or tanks. Power plants often use steel reducers as well, since they need to move large amounts of steam and other fluids around their facilities. Finally, water supply systems use steel reducers for similar reasons as power plants: they need to move large amounts of fluid from one location to another quickly and efficiently.

• In the petrochemical industry, steel reducers are used to adapt to different pipe diameters for pipeline construction and transportation. The use of reducers can reduce the cost of pipeline construction and maintenance, while ensuring safety.

• In the power plant industry, steel reducers are also used for boiler project and nuclear power plant project. The heat exchangers and steam generators in nuclear power plants are equipped with steel reducers to adapt to different pipe diameters. In addition, the steel reducer is used for sewage discharge systems and municipal drainage systems in water supply system.

• In addition, the reducers are used for sewage discharge systems and municipal drainage systems in water supply system. In power plant industry, reducer is widely used for heat exchanger and boiler feed pump. In chemical industry, reducer is widely used as a part of distillation column and still. In petrochemical industry, it is used as separator column and condenser plate of distillation tower.

• Steel Reducer is also widely used in the industries that require high-efficient transportation of various kinds of fluids with different viscosity or temperature conditions.

How can I get my pipe reducers customized for a specific application?

Pipe reducers can be customized for specific applications. There are many different types of pipe reducers, each with their own method of customization. Some of the most common ways to customize pipe reducers include:

• Standardization: If you need your pipe reducer to fit into a certain space, it may be possible for us to custom-make one that will fit perfectly.
• Reduction ratio: This refers to how much smaller the inner diameter is than its outer diameter (or vice versa). For example, if you have a 1″ inch diameter pipe and want it reduced down to 0.5″, we could make this happen easily on our end!
• Material choice: We can make any type of material work when creating your unique piece; just let us know what materials would work best in your situation before getting started on production!

Pipe Reducers are useful in reducing flow pressure, maintaining steady flow and increasing system control.
In the oil and gas industry, pipe reducers are used to maintain steady flow pressure and reduce flow rate. They can also be used as a means of increasing system control by allowing for individual component testing during production or processing operations.
In addition to their use in the oil and gas industry, pipe reducers are popular among businesses that need to reduce pressure from one system into another. For example, if you operate a factory that uses compressed air to power your equipment, you’ll likely need a pipe reducer in order to move this air from one device or location to another. The same holds true with hydraulic systems: if you have an hydraulic lift truck at work and want it available at all times without having to refill its tank after every shift change, then installing a pipe reducer on each end will ensure full-time availability while reducing wear on the truck itself—as well as unnecessary costs associated with refilling its system!
To determine which size pipe reducer best fits your application needs (and budget!), take stock of what kind of piping material was originally installed within your facility before deciding whether or not it would make sense replace those pipes altogether instead.

Where will I use an eccentric reducer?

You can use an eccentric reducer to increase flow volume and pressure. For example, let’s say you’re using a pipe connection that has two straight pipes coming out of each other but not connecting together. The two pipes will not be able to connect because they’re all jammed up against each other so you need an eccentric reducer to help with this issue. You could also use an eccentric reducer if there is too much pressure in one area and too little pressure in another area of your system by using an eccentric reducer as well, which would allow for even distribution throughout the entire system.
Another common scenario where you would use an eccentric reducer is if there was no way for water or gas flow through a certain section of piping without creating turbulence or taking up valuable space inside that particular piece of hardware which means those types of pipes wouldn’t work well together anyway!

How to order reducers?

Reducers are commonly used in pipelines for reducing flow velocities and pressure drop. In order to achieve this, they have different ID sizes at each end which creates turbulence in fluid flow direction due to which velocity decreases and so does pressure gradient (drop).

Pipe Size and Outer diameter

The Pipe size or diameter is determined by the bore of the pipe and its outside diameter.

• Bore = Inside Diameter x π / 4 (Approximate)

• Outside Diameter = Bore + Wall Thickness

• Wall Thickness = Outside Diameter / 2 (Approximate)

Governing standard (ASME B16.9, GB, HG, HGJ, SH, SY, DL, AN, SI, JIS, or DIN).

If you’re an engineer or designer, it’s your responsibility to specify the right fitting for your project. When specifying a reducer, the governing standard (ASME B16.9, GB, HG, HGJ, SH, SY, DL, AN or SI) is one consideration. Each governing standard has its own unique specifications for fittings and flanges. For example: ASME B16.9 governs pressure piping systems used in industrial applications that carry fluids at temperatures up to 250° F (121° C). GB is another standard which governs pressure piping systems used in manufacturing plants that carry fluids at temperatures of less than 300° F (149° C).

End connection (Welded/Flanged, etc)

End connections are the points where your reducer connects to another piece of equipment, such as a pump or valve. The end connection can be welded or flanged, depending on what you need it for. Welded end connections are commonly used for high pressure applications because they’re more robust and less prone to leaking than their flanged counterparts. Flanged ends are used for lower pressure applications since they can be easily replaced if they start leaking.

Distance from end to end.

The distance between the ends of a pipe is called its length. Length can be measured with a micrometer, but often you’ll need to calculate it using the formula:

• Length = (2 x breadth) + (breadth x pitch). The “breadth” in this equation refers to the diameter at both ends of your reducer and the “pitch” refers to its angle. The pitch angle of a reducer is calculated using this formula:

• Pitch = 2 cos(360/D). In this equation, D stands for diameter and cos(x) means cosine function with an input of x degrees

Material of construction.

The material of construction refers to the general type of material that is used in the non-metallic reducer. The most common materials used are copper, stainless steel, and alloy steel.

Seamless or welded construction.

Seamless construction is more expensive than welded construction, but it has a lower weight and a higher strength. Welded reducers are less expensive, but have a higher weight and lower strength.

Fluid service and Corrosion allowance

For a tube reducer to be used in an application, it must meet the fluid service and corrosion allowance requirements. The fluid service is the maximum allowable operating pressure of the pipe. The corrosion allowance is the maximum allowable operating temperature of the pipe.

The following table shows typical values for these items:

Pressure class

The pressure class is also known as the working pressure. This is a standard rating of the amount of stress that can be placed on a pipe’s walls, based upon its diameter and length. The higher the number, the more pressure a pipe can withstand before bursting or distorting itself.

The general categories are:

• Class 150 (1/2-inch pipe; 2-inch pipe) – This is used for residential applications such as faucets, toilets, sinks and washing machines.

• Class 300 (1/2-inch pipe; 2 1/2 inch) – This is used for commercial applications such as air compressors and air conditioning units owned by large businesses or municipalities. It also applies to other services that require high water flow rates, such as irrigation systems and fire sprinklers..

At this point, you should know how to order reducers. You’ve gone through different types of reducers and their applications. You also understand the considerations for choosing the right size, material and construction type for your application. This can help you save money on unnecessary expenses by ordering the correct item from the start instead of having to change or replace it later on down the line when there’s already too much invested in it to get rid of altogether.

How to purchase the right pipe reducer?

In order to get the right pipe reducer, it’s important to know what you need. This is no easy task, so we’re going to walk you through each step of the process so you can feel confident about your purchase.
Take notes on the dimensions of the pipes.
The first step to choosing the right pipe reducer is to take notes on the dimensions of the pipes. You’ll want to measure their diameter (the thickness of one side), and also note down how long they are.
The next thing you should do is record some other important details about your pipes: what type they are, what material they are made out of, and so on.
Understand the types of reducers.
The type of reducer you need depends on the size of your pipe and its purpose. For example, if you have a small-diameter pipe that carries water at high pressure, you’ll need a burst-resistant reducer to prevent it from bursting when connected to a larger diameter pipe. There are also thermal expansion reducers that increase the flow rate of hot water while reducing pressure, which makes them ideal for use in radiant heating systems.
Be specific about your needs.
Before you purchase a reducer, you should know the size of your pipe. The size is measured in inches, and it’s the distance between two parallel surfaces separated by a single layer. If you don’t know the exact measurement, then take an object with a known size (such as a ruler) and measure from one side to another. When purchasing your reducer, be sure to look for one that has the same measurements as what you have currently.
If this isn’t possible and there isn’t room for error in your application, then consider buying more than one reducer instead of having too much excess material connected at once. This way if something breaks or needs repair later on down the road, only minimal work will need done since only one piece needs replacing instead of several at once!
Look at material of the reducer.
The material of the reducer is important to consider because it affects its durability, strength and corrosion resistance. In general, carbon steel pipe reducers are more economical than stainless steel ones but are less resistant to chemical corrosion (e.g., from acids).
Another factor to take into account when choosing between carbon steel and stainless steel reducers is their temperature tolerance. While both can withstand high temperatures—see their respective charts for details—carbon steels tend to expand more than stainless steels do when exposed to heat. Thus, you may need a larger-diameter carbon steel reducer on a hot day as compared with what would suffice in colder weather if you were using a similar-size stainless one instead.
Know your location’s temperature range.
It is also important to know your location’s temperature range. While one reducer might work well in a colder climate, it may be too weak for warmer areas. The same goes for different materials, such as brass or plastic. Finally, the diameter of the pipe matters as well: if you have a large diameter pipe and need to reduce its size down significantly, then this will require a higher grade of material than if you were reducing a smaller diameter pipe by only a few inches.
Take notes on your required pressure.
Now that you know the type of pipe reducer you need, it’s time to assess your required pressure. The ideal pressure for any location depends on a variety of factors—location, temperature range, material and type of reducer—and will vary from one project to another.
To determine the proper pressure for your project:
Assess your location. If you’re working in an area with extreme temperatures (or high elevation), chances are you’ll need to raise the level of backpressure by increasing the size of your reducer. This is because lower temperatures make rubber more flexible and thus more susceptible to cracking; higher temperatures create more expansion forces within pipes’ walls; and higher elevations cause water to boil at lower temperatures than sea level does; therefore raising backpressure helps protect against all three issues.
Use the right pipes.
Before you start, make sure that you have the right pipes for the job. Make sure to use a pipe reducer with the correct size of pipe and material for your application.
In order for a pipe reducer to work properly, it needs to be able to handle pressure and temperature loads of the system in which it is used. The pressure rating of a reducer is determined by both its wall thickness and internal volume capacity. The higher these two values are, the more stress they can handle before failing (and while this is not always true, generally speaking).
The temperature rating refers simply to how much heat will affect your piping before failure occurs; if it gets too hot or cold outside of normal conditions then this could cause problems with installation as well as performance.
Buy the reducer from a trusted supplier.
When it comes to pipe reducers, you can buy from a trusted supplier. A good supplier should be able to provide advice on the right reducer for your needs, installation and maintenance of the product, and safety.
The best way to purchase the right pipe reducer is to be a knowledgeable consumer. This means that you have to pay attention to the details when buying one, and use all of your resources wisely. You must also choose a trusted supplier so that you can trust their products will work well for your needs (and not cause any damage).

Source: China Pipe Reducer Manufacturer – Yaang Pipe Industry (www.epowermetals.com)

(Yaang Pipe Industry is a leading manufacturer and supplier of nickel alloy and stainless steel products, including Super Duplex Stainless Steel Flanges, Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe. Yaang products are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining, Sewage treatment, Natural gas and Pressure vessels and other industries.)

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