Alloy Steel Pipes have hollow sections and are widely used as pipelines for conveying fluids, such as oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, alloy steel pipe has lighter weight when its bending and torsional strength is the same. Alloy steel pipe is a kind of steel with economic cross-section. It is widely used in manufacturing structural and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffolding used in construction. Manufacturing annular parts with alloy steel tubes can improve material utilization rate, simplify manufacturing process, save material and processing time, such as rolling bearing rings, Jack sleeves, etc. At present, steel tubes have been widely used in manufacturing.
Alloy steel pipes are mainly used in power plants, nuclear power plants, high-pressure boilers, high-temperature superheaters and reheaters and other high-pressure and high-temperature pipelines and equipment. They are made of high-quality carbon steel, alloy structural steel and stainless heat-resistant steel, and are hot-rolled (extruded, expanded) or cold-rolled (drawn).
Alloy pipe is defined by the material used in production (i.e. material), as the name implies, it is made of alloy pipe; seamless pipe is defined by the production process (seamless), which is different from seamless pipe is seamless pipe, including straight welded pipe and spiral pipe.
Alloy seamless pipe is a kind of seamless steel pipe, its performance is much higher than that of general seamless steel pipe, because this type of steel pipe contains more Cr, its high temperature resistance, low temperature resistance, corrosion resistance performance is much better than other steel pipe, so the alloy pipe is widely used in petroleum, aerospace, chemical, electric power, boiler, military and other industries.
Application:Petroleum, Chemical Engineering, Electricity, Boiler
Standard:ASTM A335/A335M, ASTM A213/213M, DIN17175-79, JIS3467-88,GB5310-95
Material:P5,T5,P11,P12,STFA22, P22, T91, T9,WB36
ASTM A335–for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
ASTM A519–for Seamless Carbon and Alloy Steel Mechanical Tubing
ASTM A213–for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Super heater, and Heat-Exchange Tubes
ASTM ASME (S)A-335/(S)A-335M Grade and Chemical Composition
Note: (S)A335 P91 other chemical composition are : V 0.18~0.25; N 0.030~0.070; Ni ≤ 0.40; Al ≤ 0.04 ; Nb 0.06~0.10
(S)A335 P92 other chemical composition are : V 0.15~0.25; N 0.030~0.070; Ni ≤ 0.40; Al ≤ 0.04 ; Nb 0.04~0.09; W 1.5~2.00 ; B 0.001~0.006
Outside Diameter & Tolerance
Wall thickness & Tolerance
Alloy welded pipe is also a kind of welded pipe. Welded steel pipe, also known as welded pipe, is a steel pipe made of steel plate or strip after coiling and forming. Welded steel pipe has the advantages of simple production process, high production efficiency, more varieties and specifications and less equipment, but its general strength is lower than seamless steel pipe.
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