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A guide to choosing the right lap joint stub end

What is a lap joint stub end?

You may be wondering, what is a lap joint stub end? Lap joint stub ends are fittings used in place of welded flanges where rotating back up flanges are desired. A stub end and a lap joint flange are normally mated together by a gasket and two bolts. Lap joint stub ends can be produced with many different material grades such as stainless steel, alloy steel, carbon steel and low temperature service carbon steels. Stub end is available in long pattern and short pattern.

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Types of Stub End

What are the most common types of lap joint stub ends?

Stub End is a quick and easy way to connect pipes. It has three different types – Type A, Type B, and Type C. They are classified by the different “R” – the lap corner.
Stub End has three different types – Type A, Type B, Type C. They are classified by the different “R” – the lap corner. But in actual working, “type A” is the common type as it is matching with lap joint flange specially.

  1. Type A: To match standard lap joint flange, it is the default type if the client didn’t indicate the type specifically .
  2. Type B: Stub End B type is mainly used for slip-on flanges and backing flanges, its lap angle is different from “type A”.
  3. Type C: It can be used either with lap joint flange or slip-on flange. But it is not common type, Kaysuns mainly offer “Type A” and “Type B” stub end.

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Long Pattern Stub End and Short Pattern Stub End

Stub ends are available in two different patterns: the short pattern, called MSS-A stub ends, and the long pattern, called ASA-A stub ends (or ANSI length stub end).
ASA stands for American Standard Association and is a standard used by many countries worldwide to ensure compatibility of products. The ASA standard length stub end is used when you need your fittings to fit into other fittings of the same size.

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Short pattern (MSS) and long pattern stub ends (ASA)

Specifications for stub end

The lap joint flange is machined to be a mirror image of the stub end.
It is bored to match the pipe’s outside diameter.
The face of a lap joint flange matches that of the stub-end, which is having the same specifications as butt-welded pipe, being equal to ASME B16.9, MSS SP-43, DIN 2605 and JIS B2313 or GB/T12459.

Dimensions of ASME B16.9 Lap Joint Stub Ends

Drawing of asme b16.9 lap joint stub ends - A guide to choosing the right lap joint stub end

The technical drawing of ASME B16.9 lap joint stub ends

Nominal Size Outside Diameter of Barrel Long Pattern
Length, F
Short Pattern
Length, F
Radius of
Fillet, R
Diameter
of Lap, G
NPS Max.
mm.
in.
Min.
mm.
in.
mm.
in.
mm.
in.
mm.
in.
mm.
in.
1/2 22.8
0.896
20.5
0.809
76
3.00
51
2.00
3
0.12
35
1.38
3/4 28.1
1.106
25.9
1.019
76
3.00
51
2.00
3
0.12
43
1.69
1 35.0
1.376
32.6
1.284
102
4.00
51
2.00
3
0.12
51
2.00
1 1/4 43.6
1.716
41.4
1.629
102
4.00
51
2.00
5
0.19
64
2.50
1 1/2 49.9
1.965
47.5
1.869
102
4.00
51
2.00
6
0.25
73
2.88
2 62.4
2.456
59.5
2.344
152
6.00
64
2.50
8
0.31
92
3.62
2 1/2 75.3
2.966
72.2
2.844
152
6.00
64
2.50
8
0.31
105
4.12
3 91.3
3.596
88.1
3.469
152
6.00
64
2.50
10
0.38
127
5.00
3 1/2 104.0
4.096
100.8
3.969
152
6.00
76
3.00
10
0.38
140
5.50
4 116.7
4.593
113.5
4.469
152
6.00
76
3.00
11
0.44
157
6.19
5 144.3
5.683
140.5
5.532
203
8.00
76
3.00
11
0.44
186
7.31
6 171.3
6.743
167.5
6.594
203
8.00
89
3.50
13
0.50
216
8.50
8 222.1
8.743
218.3
8.594
203
8.00
102
4.00
13
0.50
270
10.62
10 277.2
10.913
272.3
10.719
254
10.00
127
5.00
13
0.50
324
12.75
12 328.0
12.913
323.1
12.719
254
10.00
152
6.00
13
0.50
381
15.00
14 359.9
14.170
354.8
13.969
305
12.00
152
6.00
13
0.50
413
16.25
16 411.0
16.180
405.6
15.969
305
12.00
152
6.00
13
0.50
470
18.50
18 462.0
18.190
456.0
17.969
305
12.00
152
6.00
13
0.50
533
21.00
20 514.0
20.240
507.0
19.969
305
12.00
152
6.00
13
0.50
584
23.00
22 565.0
22.240
558.0
21.969
305
12.00
152
6.00
13
0.50
641
25.25
24 616.0
24.240
609.0
23.969
305
12.00
152
6.00
13
0.50
692
27.25
  • *All dimensions are furnished in both SI(metric) units and US Customary units.
  • *Gasket face finish shall be in accordance with ASME B16.5 for raised face flanges.
  • *The lap thickness, T, shall not be less than nominal pipe wall thickness.
  • *When short pattern stub ends are used with larger flanges in Classes 300 and 600, with most sizes in Classes 900 and higher, and when long pattern stub ends are used with larger flanges in Classes 1500 and 2500, it may be necessary to increase the length of the stub ends in order to avoid covering the weld with the flange.
  • *When special facings such as tongue and groove, male and female, etc., are employed, additional lap thickness must be provided and such additional thickness shall be in addition to (not included in) the basic length, F.
  • *Dimensions of “Radius of Fillet, R” conform to the radius established for lap joint flanges in ASME B16.5.
  • *Dimensions of “Diameter of Lap, G” conform to standard machined facings shown in ASME B16.5.

Dimensions butt welded Stub Ends schedule 10MSS SP-43 type A/B

stubend dim - A guide to choosing the right lap joint stub end
NPS OD T G F R
Type A
R
Type B
1/2 21.3 2.11 34.9 50.8 3.05 0.76
3/4 26.7 2.11 42.9 50.8 3.05 0.76
1 33.4 2.77 50.8 50.8 3.05 0.76
1.1/4 42.2 2.77 63.5 50.8 4.83 0.76
1.1/2 48.3 2.77 73 50.8 6.35 0.76
2 60.3 2.77 92.1 63.5 7.87 0.76
2.1/2 73 3.05 104.8 63.5 7.87 0.76
3 88.9 3.05 127 63.5 9.65 0.76
3.1/2 101.6 3.05 139.7 76.2 9.65 0.76
stubend dim - A guide to choosing the right lap joint stub end
NPS OD T G F R
Type A
R
Type B
4 114.3 3.05 157.2 76.2 11.18 0.76
5 141.3 3.40 185.7 76.2 11.18 1.52
6 168.3 3.40 215.9 88.9 12.7 1.52
8 219.1 3.76 269.9 101.6 12.7 1.52
10 273.1 4.19 323.9 127 12.7 1.52
12 323.9 4.57 381 152.4 12.7 1.52
14 355.6 4.78 412.8 152.4 12.70 1.52
16 406.4 4.78 469.9 152.4 12.7 1.52
18 457.2 4.78 533.4 152.4 12.70 1.52
20 508 5.54 584.2 152.4 12.70 1.52
24 609.6 6.35 692.2 152.4 12.7 1.52

Dimensions are in millimeters unless otherwise indicated. Weights are in kilograms and approximately given.

DIMENSIONAL TOLERANCES OF STUB ENDS MSS SP-43

Nominal Pipe Size 1/2 up to 2.1/2 3 to 3.1/2 4 5 to 8 10 to 18 20 to 24
Outside Diameter at Welding End (OD) 0.8 0.8 0.8
+ 1.6

– 0.8

+ 2.29

– 0.76

+ 3.05

– 0.76

Overall Length (F) 1.6 1.6 1.6 1.6 2 2
Outside Diameter of Lap (G)
+ 0

– 0.76

+ 0

– 0.76

+ 0

– 0.76

+ 0

– 0.76

+ 0

– 1.6

+ 0

– 1.6

Thickness of Lap (T)
+ 1.52

– 0

+ 1.52

– 0

+ 1.52

– 0

+ 1.52

– 0

+ 1.52

– 0

+ 1.52

– 0

Fillet Radius of Lap (R)
+ 0

– 0.76

+ 0

– 0.76

+ 0

– 1.6

+ 0

– 1.6

+ 0

– 1.6

+ 0

– 1.6

Wall Thickness (t) Not less than 87.5% of Nominal Wall Thickness

Dimensional tolerances are in millimeters unless otherwise indicated.

Notes:

  • Type A for Lap Joint Flanges
  • Type B for Slip On Flanges
  • 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.

Dimensions Butt Welded Lap-Joint Stub Ends (JIS TYPE)

20220719155422 92858 - A guide to choosing the right lap joint stub endUnit: mm

Nominal Dimension Outside Diameter Height Disk Diameter (G) R Angie Schedule 5S Schedule 10S Schedule 20S Schedule 40S
A B D F 5K 10K 16K 20K Maximum Minimum Internal Diameter d Thick ness t Internal Diameter d Thickness t Internal Diameter d Thickness t Internal Diameter d Thickness t
15 1/2 21.7 30 44 51 51 51 3 1.5 18.4 1.65 17.5 2.1 16.7 2.5 16.1 2.8
20 3/4 27.2 30 49 56 56 56 3 1.5 23.9 1.65 23 2.1 22.2 2.5 21.4 2.9
25 1 34 50 59 67 67 67 3 1.5 30.7 1.65 28.4 2.8 28 3 27.2 3.4
32 1 1/4 42.7 50 70 76 76 76 4 2 39.4 1.65 37.1 2.8 36.7 3 35.5 3.6
40 1 1/2 48.6 50 75 81 81 81 4 2 45.3 1.65 43 2.8 42.6 3 41.2 3.7
50 2 60.5 50 85 96 96 96 4 2 57.2 1.65 54.9 2.8 53.5 3.5 52.7 3.9
65 2 1/2 76.3 50 110 116 116 116 5 2.5 72.1 2.1 70.3 3 69.3 3.5 65.9 5.2
80 3 89.1 50 121 126 132 132 5 2.5 84.9 2.1 83.1 3 81.1 4 78.1 5.5
90 3 1/2 101.6 50 131 136 145 145 5 2.5 97.4 2.1 95.6 3 93.6 4 90.2 5.7
100 4 114.3 50 141 151 160 160 5 2.5 110.1 2.1 108.3 3 106.3 4 102.3 6
125 5 139.8 50 176 182 195 195 6 3 134.2 2.8 133 3.4 129.8 5 126.6 6.6
150 6 165.2 50 206 212 230 230 6 3 159.6 2.8 158.4 3.4 155.2 5 151 7.1
200 8 216.3 65 252 262 275 275 6 3 210.7 2.8 208.3 4 203.3 6.5 199.9 8.2
250 10 267.4 65 317 324 345 345 6 3 260.6 3.4 259.4 4 254.4 6.5 248.8 9.3
300 12 318.5 65 360 368 395 395 9 3 310.5 4 309.5 4.5 305.5 6.5 297.9 10.3
350 14 355.6 150b) 403 413 440 440 9 3 347.6 4 345.6 5 339.6 8 333.4 11.1
400 16 406.4 150b) 463 475 495 495 9 3 397.4 4.5 396.4 5 390.4 8 381 12.7
450 18 457.2 150b) 523 530 560 560 9 3 448.2 4.5 447.2 5 441.2 8 428.6 14.3
500 20 508 150b) 573 585 615 615 9 3 498 5 497 5.5 489 9.5 477.8 15.1
550 22 558.8 150b) 630 640 670 670 9 3 548.8 5 547.8 5.5 539.8 9.5 527 15.9
600 24 609.6 150b) 680 690 720 720 3 598.6 5.5 596.6 6.5 590.6 9.5 574.6 17.5

Note:
The surface roughness of the gasket shall be less than Ra 6.3 specified in JIS B 0601.

  • a). The thickness of collar (GT) shall be the same as the thickness (t) shown in Toleranee Table.
  • b). The length (F) may be smaller than above required according to the agreement between the purchaser and the manufacturer.
Toleranee Table Unit: mm
Items Nominal Dimension
A 15 to 65 80 to 100 125 to 200 250 to 450 500 to 600
B 1/2 to 2-1/2 3 to 4 5 to 8 10 to 18 20 to 24
Outside Diameter (D) +1.6 , —0.8 ±1.6 +2.4 , -1.6 +4.0 , -3.2 +6.4 , -4.8
In ter nal Diamete of end face (d) ±0.8 ±1.6 ±3.2 ±4.8
Thickness (t) +Not Specified, -12.5%
Disk Thickness (GT) +1.6 , 0 +3.2 , 0
Height (F) ± 1.6 ± 2.4
Disk Diameter (G) 0 , -0.8 0 , -1.6

Materials of Stub End for Lap Joint Flanges

We have a wide range of stub ends for lap joint flanges, including:
Stainless steel, duplex steel 2205 (DSS) and super duplex 2507 (SDSS), Inconel alloy, Hastelloy C276, Monel 400, Incoloy 800, copper alloy, titanium alloy etc.
We can also make stub end of WPB and other carbon steel.

Material Grade UNS Equivalent
A234 WPB Carbon Steel B K03006
A403 Stainless Steel 304/304L S30403
304H S30409
316/316L S31603
316H S31609
317L S31703
904L N08904
309S/H S30908
310S S31008
321 S32100
6XN N08367
20CB N08020
347 S34709
254SMO S31254
A815 Duplex /Super Duplex 2205 S31803/S32205
Zeron 100 S32760
2507 S32750
410 S41000
A366 Nickel Alloys HC22 N06022
HB-3 N10675
HG3 N06985
HX N06002
HC2000 N06200
HC276 N10276
NCI N06600
NC N04400
N N02200
NL N02201
NCMC N06625
NICMC N08825
NIC10 N08810
NIC11 N08811

Lap-joint flanges are most commonly available in carbon steel and low temperature carbon steel, because it is a lower cost than the Stub End that will be wetted by the service and it must be of a suitable grade of steel. If orientation and alignment of bolt holes is the only issue, then for standardization, then the Stub End and the Lap Joint Flange can be of the same material.
The most common material grade for stub end is the ASTM A403 / ASME SA403 (stainless steel stub ends). With reference to EU materials, the most common grades are DIN 1.4301, DIN1.4306, DIN 1.4401, DIN 1.4404.

Manufacturing process of Stub End

How are stub ends made? Lap joint stub end is the stamping of the outer edge of the steel pipe or the edge of the hole along a certain curve into a vertical edge, as shown in the figure.

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Figure. stamping forming of flanging

When the line along the edge is a straight line, the edge deformation is transformed into bending, so it can also be said that bending is a special form of edge deformation. However, the bending deformation of the blank is only limited to the rounded part of the bending line, while the rounded part of the blank and the edge part are deformation areas, so the edge deformation is much more complex than the bending deformation. The flanging method can process the three-dimensional parts with complex shape and good rigidity, and can make the parts assembled with other products on the stamping parts, such as the flanging of the middle wall plate of the passenger car of rolling stock, the flanging of the press iron of the passenger car stirrup door, the flanging of the outer door plate of the car, the flanging of the motorcycle fuel tank, the flanging of the small threaded hole of the metal plate, etc. Flanging can replace the drawing process of some complex parts and improve the plastic flow of materials to avoid rupture or wrinkling. Instead of pulling first and then cutting method to make bottomless parts, it can reduce the processing times and save materials.

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Flanging process

Usually, the flanging process is the last process for forming the contour shape or three-dimensional shape of the stamped parts. The flanging part is mainly used for interconnection between the stamped parts (welding, riveting, bonding, etc.), and some flanging is required for product flow or aesthetics.
The flap stamping direction is not necessarily the same as the press slide movement direction, so the flap process should first consider the positioning of the flap blank in the die. The correct flanging direction should provide the most favorable conditions for the flanging deformation, so that the direction of movement of the convex or concave die is perpendicular to the surface of the flanging profile to reduce the lateral pressure and make the position of the flanged part in the flanging die stable.

According to the different flanging direction can be divided into vertical flanging, horizontal flanging and inclined flanging, where the vertical flanging, trimming parts opening upward, forming stable, convenient positioning, but also can use air pressure pad pressure material, in the conditions should be used as far as possible. In addition, according to the number of flanging surface can be divided into single-sided flanging, multi-sided flanging, closed curve flanging. According to the nature of the deformation of the blank of the flanging process can be divided into elongation class screen curve flanging, elongation class surface flanging, compression class plane curve flanging and compression class surface flanging.

Finish of Stub End

ASME B16.25 END WELDING BEVEL as right.

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ASME B16.25 End Welding Bevel

Stub ends are manufactured using a variety of different end finishes. Beveled, squared, flanged, grooved, and threaded are the most common options.

  • Beveled Ends: A beveled end is cut at an angle that allows it to fit tightly against the surface of a pipe. This type of end finish is ideal for high-torque applications.
  • Squared Ends: A squared end has straight sides that allow it to fit loosely in a pipe. This type of end finish is ideal for low-torque applications.
  • Flanged Ends: A flanged end has a lip around its perimeter that helps keep the stub end from rotating while in use. This type of end finish is ideal for high-torque applications where there’s risk of rotation occurring during use (ex: conveyor systems).
  • Grooved Ends: A grooved end has grooves along its perimeter that allow it to fit into pipes with different diameters without having to be adjusted before installation (ex: couplings). This type of end finish is ideal for applications where there’s risk of rotation occurring during use (ex: conveyor systems).
  • Threaded Ends (Male Only): Male threaded stub ends come standard with threads on one side only.

Advantage of Stub End

The stub end is a type of flange joint that combines the benefits of standard welding and mechanical joining.
A stub end can be made from any material, but is typically made from 304 stainless steel (which is also used in making pipe fittings). It can be used in both hot and cold water applications, as well as in other harsh environments such as chemical processing plants.
The advantage of using a stub end over other types of flanges is that it reduces overall costs by eliminating some of the premium materials that would otherwise be used to create full-length flanges. For example, instead of using full-length A182 F53 weld neck flanges on Super Duplex 2507 piping, we can combine the SAF 2507 stub end with a stainless steel lap joint flange to accomplish the same job while reducing weight and cost.

Applications Of Stub End

A stud end and a lap joint flange can be used together as an alternative way to make a flanged connection than welding neck flanges.
The two devices to be combined, in this case, are:

  • The stub end, which is essentially a piece of pipe, with one end flared outwards and the other prepared to be welded to a pipe of the same bore size (NPS = nominal pipe size), material and wall thickness. The most widely used fabrication tool for stub ends is the flaring machine, which is able to flare the end of the pipe and then cuts it to length.
  • A Lap Joint Flange, which is used to actually bolt the two lengths of pipe together.

This type of connection does not require welding skills and can be performed by a competent fitter with minimal training or experience. The process involves cutting each pipe at an angle so that they fit together snugly when bolted together with bolts or screws through holes provided in each stub end.

Assembly method of stub ends and lap joint flanges

A stub end and lap joint flange assembly can be done in the following way:

  • 1. Slip the lap joint flange over the stub end flange.
  • 2. Weld the stub end flange onto a pipe spool, using an approved WPS by a qualified welder. The lap joint flange can revolve around the stub end, which is now attached to the piping spool.
  • 3. Orientate and align bolt holes of the lap joint flange with bolt holes of a mating flange of the same ASME B16.5 designate rating and NPS.
  • 4. Mate to any flange covered in ASME B16.5, weld neck, slip on, threaded, socket weld another lap joint flange or fabricated plate flange with compatible bolting dimensions.

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Assembly of Stub End

Why use stud ends?

Stud ends and lap flanges can be used together as an alternative to making flange connections instead of welding neck flanges.
In this case, the two devices to be combined are:
A short pipe end is basically a piece of pipe with one end flared outward and the other end ready to be welded to a pipe with the same bore diameter (NPS = nominal pipe size), material and wall thickness. The most widely used tool for fabricating short pipe ends is the flaring machine, which is capable of flaring the pipe end and then cutting it to length.
Overlap flanges, which are used to join two sections of pipe together.

Commercial Benefits

The commercial advantage is that the stud end will be wetted and must be made of material that meets the design and conditions of use of the piping process. However, the lap flange is non-wetted and can be made from a lower grade of metal material as long as it meets the following requirements.
The mechanical strength requirements of the piping system.
This means that:
With double stud ends and double lap joints, you can have double stud ends and carbon steel lap flanges.
Or you can have stainless steel stud ends and carbon steel lap flanges. There are other bimetallic combinations that make flange assemblies commercially cheaper.
The price difference between duplex/stainless steel and carbon steel has narrowed in recent years and this practice is less common on larger projects, but the cost difference will always be there (the higher the length of the NPS and pipe/piping system, the higher the cost savings). On the other hand, storage costs for individual components (i.e., weld neck flanges) require less shelf space than storage costs for lap joints and stud ends. End-users and contractors should consider all of these factors to determine the practical convenience of using stud ends, as often the commercial advantages are still valid and may be appropriate in certain situations, especially in “brownfield” retrofits.

Installation Benefits

The “loose” flange concept for lap joints is very useful during field installation of piping systems. If two spools are to be mated in the field, it is advantageous to have a flange that can be rotated when aligning the bolt holes prior to introducing the short stud bolts and matching nuts. Bolt holes are easier to locate and align if there is a slide valve
If the process requires positive isolation, it must be removed frequently.

Stub End Restrictions

A lap joint consists of two separate components that are not integrated with the weld and similar dimensions/pressure ratings/materials. It lacks mechanical strength and the ability to withstand fatigue, such as single-piece weld neck flanges or slip-on flanges welded together or socket weld flanges. In circulating use, use EN 1092-1 35 PN 16-25-40 type collars instead of stud ends (especially for shut-off pumps and compressors). If process design conditions, service and end application are carefully considered, then lap flange mechanical connections are an effective and inexpensive way to install piping systems compared to using standard flanges.
Stud ends and lap flanges can be used together as an alternative to making flange connections instead of welding neck flanges.
In this case, the two devices to be combined are:

  • The short pipe end is basically a pipe with one end flared outward and the other end ready to be welded to a pipe with the same bore diameter (NPS = nominal pipe size), material and wall thickness. The most widely used tool for fabricating short pipe ends is the flaring machine, which is capable of flaring the pipe end and then cutting it to length.
  • A lap joint flange, which is used to join two sections of pipe together.

How do I use a lap joint stud end?

The flange is first slid onto the pipe or stud end, and then the stud end is welded to the pipe so that the flange can rotate freely around the stud end.

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Quality control for stub end

High quality control standards reduce the chances of faulty or defective lap joint stub ends being shipped to customers. Without adequate quality control, end users could potentially receive products that do not meet their needs or expectations. This leads to a waste of time and money due to repairs or replacements. The superior quality of our lap joint stub ends provides our customers with long-lasting, trustworthy products that will continue to perform as needed and expected for many years.
Our team members are trained on the proper procedures for performing tests, inspections and evaluations during each step of production. These include:

  • Dimensional testing
  • Visual inspections (surface treatments)
  • Hydro-testing

Applications of stub end

Stub ends are used in many applications. They’re the pipe fittings with a small hole at the end that screws onto another component. For example, stub axles attach the sheaves on a circular saw and a screw thread is used for attaching pipe to other piping.
Stub ends are also used in welding assemblies. The purpose of an elbow is to allow bending and/or rotation of pipes or tubing without distorting them from their normal shape. To make an elbow, one end of a straight tube is bent so that it has a 90 degree angle at its joint with another straight tube or pipe part. In order for this joint to work correctly, special stub ends are needed that have an O-ring and ball bearings (to lubricate) inside the tube so that the elbow bends without distorting each of those parts because there’s now more space between them than usual (see Figure 1). This type of joint allows you to bend both pipes at once during assembly – but only if they’re manufactured correctly!

Guide for selecting the correct lap joint stub end

This is a guide for choosing the right lap joint stub end:
As the name suggests, a lap joint stub end is used in conjunction with a lap joint flange. Lap joint flanges slide over the pipe and are most commonly used with small diameter piping or in situations where the stub end will not be subject to high pressure. Because of this, lap joint stub ends are an economical choice when building your piping system.
A lap joint stub end is often referred to by its schedule number or as a “short pattern” (for example: A403 WP316L Short Pattern). Stub ends have an industry standard length-to-wall thickness ratio that differs from that of other butt weld fittings. This ratio is longer than other butt weld fittings, allowing for proper welding and ease of installation on site.

There are six quality control standards that go into the production of every lap joint stub end, including but not limited to: dimensions, wall thickness allowance/variance, chemical composition testing/reports, hardness testing/results, microstructure examination and visual inspection reports.

Reasons to choose us for your lap joint stub ends

  • 1. Our stub ends are made from high-quality steel, which means they’ll last a long time and won’t break.
  • 2. We offer free samples so you can try out our product before committing to it.
  • 3. We offer fast shipping, usually within 1 week of ordering (depending on your location).
  • 4. We have an experienced team that will help you with any issues or questions you may have about our products or services.

How to order a Stub Ends

To order a stub end, you need to provide the following information:

Short or Long pattern + Type A or B + SCH/Wall thickness + Size + Material + Standard + Order Quantity

  • NPS – Nominal Pipe Size (the size of your pipe at the connection point)
  • Schedule – The thickness of the wall of your pipe as it relates to its diameter. The lower number is the thicker wall.
  • Length – The length of the stub end you require, according to standards MSS SP43 (for American steel pipes), ASME B16.9 (for American steel pipes), or custom length.
  • Material grade – You can choose from several different grades of material, including 316/316L and 304/304L.
  • Ends finish – You can choose from several different finishes for your end caps, including Plain End, Beveled End, Ring Type Joint.

For example, you want to purchase 100 PCS stud ends for your system with 10″ SCH80S, long type, stainless steel 304L piping designed to comply with ASME, so the instructions are as follows:

  • Type A long type stud end, 10″ x SCH80S, A403 WP304L, ASME B16.9, 100 pieces

Source: China Stub Ends Manufacturer – Yaang Pipe Industry Co., Limited (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.)

If you want to have more information about the article or you want to share your opinion with us, contact us at [email protected]

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