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We are ASME SA312 TP304L stainless steel welded pipe manufacturer and supplier.ASME SA312 TP304L Thick wall stainless steel welded pipe manufacturer in China.
SA312 TP304L Welded pipe Specification: ASME SA312 specification covers seamless pipe and welded pipe for austenitic stainless steel. These high performance austenitic stainless steels have a fully austenitic microstructure in the quench annealed condition.
ASME SA312 TP304L Stainless steel welded pipes supplier
RYIN Stainless Welded pipe factory produce and export of stainless steel seamless and welded pipes per ASME SA312 in Grade of TP304L/304L, TP316/316L/316Ti, TP321/tp321H, TP SS347H, TP317L, TP904L TP309S/H TP310S/H and SS446 among other special grades. Stainless steel seamless tubes are available in compliance with ASME A213 and ASME A269 in common grades of such as 304/304L and 316/316L in standard tube sizes and wall thicknesses. We can offer custom size cold drawn stainless-steel pipes and stainless-steel tubes to our customers. Generally stainless-steel pipes and stainless-steel tubes are available in standard OD or NB sizes. However, with our tube processing capabilities we can offer any custom size outside DIA and thickness to our customers.
Stainless TP304L welded pipe production range:
OD12.7 to 2500mm, Thick:0.8mm-60mm, Length 500mm to 13000mm
SA312 TP304L Welded pipe Chemical Composition
| Grade |
UNS
Design |
Composition, % |
| C |
Mn |
P |
S |
Si |
Cr |
Ni |
Mb |
Ti |
Nb |
N |
Cu |
Ce |
B |
Al |
| SA312 TP304L |
S30403 |
0.035 |
2 |
0.045 |
0.03 |
1 |
18.0–20 |
8.0–13 |
. . . |
. . . |
. . . |
. . . |
. . . |
. . . |
|
|
SA312 TP304L Welded pipe Tensile Requirements
| Grade |
UNS
Designation |
Tensile Strength, Min. ksi [MPa] |
Yield strength, min ksi [MPa] |
other |
| TP304L |
S30403 |
70 [485] |
25 [170] |
|
SA312 TP304L Welded pipe Heat Treatment Requirements
| Grade |
UNS
Designation |
Finished |
Heating Temperature |
Cooling/testing Requirements |
| SA312
Tp304l |
S304, S30409 |
Cold |
1900 °F [1040 °C] |
See Spec |
| SA312 TP304L |
S304, S30409 |
Hot |
1900 °F [1040 °C] |
See Spec |
SA312 TP304L Welded pipe Elongation Requirements
| Elongation in 2 in., min, % |
longitudinal |
Transverse |
Grain size |
| Longitudinal |
Transverse |
| 35 |
25 |
35 |
25 |
According to standard |
Our SA312 TP304L Welded pipes manufactured from cold-forming process using coils of steel sheet with automated spiral welds. Great strides were made in quality control, testing, joints and protective coatings. Welded steel pipe is available in wide ranges of sizes and properties of the steel. These ERW Pipes carry high strength, ease of installation, high flow capacity, leak resistance, long service life, reliability and versatility, and economy.
SA312 TP304L Welded pipe ship marking:
Markings will adhere to prescribed specifications in A999/A999M and shall include the NPS or OD and schedule number or average wall thickness, heat number, and NH (when hydrotesting is not performed) and ET (when eddy-current testing is performed) or UT (when ultrasonic testing is performed). The marking shall also include the manufacturer’s private identifying mark, the marking requirement of section 12.3 on Hydrostatic or Nondestructive Electric Test, if applicable, and whether seamless (SML), welded (WLD), or heavily cold-worked (HCW). For Grades TP304L, TP316H, TP321H & TP347H, the marking shall also include the heat number and heat-treatment lot identification.
Referenced Documents:
ASME Referenced Standards
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
A999 A999M Specification for General Requirements for Alloy and Stainless-Steel Pipe
A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless-Steel Tubes
E112 Test Methods for Determining Average Grain Size
E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
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Others Welded pipes:
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