ASME SA312 TP304N Stainless steel welded pipes supplier

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We produce and export ASME SA312 TP304N stainless steel welded pipes. ASME SA312 TP 304N Thickness wall stainless steel welded tubes manufacturer in China.

SA312 TP304N 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.

RYIN Stainless Welded pipe factory produce and export of stainless steel seamless and welded pipes per ASME SA312 in Grade of TP304N/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,ASME A269 ASME SA312 ASME A 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 TP304N welded pipe production range:
OD12.7 to 2500mm, Thick:0.8mm-60mm, Length 500mm to 13000mm

SA312 TP304N Welded pipe Chemical Composition

Grade

UNS
Design

Composition, %

SA312 TP304N

S30451

0.08

0.045

0.03

18.0–20

8.0–13

. . .

0.1-0.16

. . .

SA312 TP304N Welded pipe Tensile Requirements

Grade	UNS Designation	Tensile Strength, Min. ksi [MPa]	Yield strength, min ksi [MPa]	other
TP304N	S30403	70 [485]	25 [170]

SA312 TP304N Welded pipe Heat Treatment Requirements

Grade

UNS
Designation

Finished

Heating Temperature

Cooling/testing Requirements

SA312

Tp304N

S304, S30409

Cold

1900 °F [1040 °C]

See Spec

SA312 TP304N

S304, S30409

Hot

1900 °F [1040 °C]

See Spec

SA312 TP304N Welded pipe Elongation Requirements

Elongation in 2 in., min, %		longitudinal	Transverse	Grain size
Longitudinal	Transverse
35	25	35	25	According to standard

Our TP304N Stainless Steel Welded pipe 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 TP304N 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 TP304N, 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)

Stainless Steel 316/316L pipes and tubes are available in both seamless and welded form in OD and NB sizes. In addition to standard sizes, which are available in stock, our specialty is to Supplier and supply custom size 316/316L cold drawn seamless tubes from our factory.

Selecting filler metal for stainless steel pipe is about enhancing the properties of the weld and meeting the requirements of the application. Filler metals with an “L” designation, such as ER308L, provide a lower maximum carbon content, which can help retain corrosion resistance in low carbon stainless alloys. As an example: if you weld a 304L base metal with a standard 308 filler metal, you’ll actually raise the carbon content of that joint and increase the chance of corrosion. In high purity applications – food, beverage, pharmaceutical – that low carbon content is critical for maintaining corrosion resistance. Conversely, a filler metal with an “H” designation provides higher carbon content for applications requiring greater strength, particularly at high temperatures.

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