We offer ASTM A312 TP304L welded stainless steel pipe in a wide range of sizes, with outside diameter range from 1/8″ to 24″, pipe schedules from SCH 5s, SCH 10s, SCH 40s, SCH 80S for wall thickness, and size ranges of the pipe conform to ANSI B36.10 and ANSI B36.19. 304 pipe ends can be plain ends or beveled ends, and ASME SA312 pipes are finished in annealed and pickled conditions.
ASTM A312 TP304L stainless steel has excellent corrosion resistance, good fabrication, and outstanding formability characteristics, it is a low carbon (0.035% max) of 304 grade, A312 304L stainless steel pipes are used in high-temperature and general corrosive service.
ASTM A312 TP304L Welded Pipe Specifications
| Specification | ASTM A312 |
|---|---|
| Grades | Plain Ends, Beveled Ends |
| NPS | 1/8″ – 24″ |
| Schedule | Sch 5 To Sch 160 |
| Length | Max 22000 Mm |
| Ends | Plain Ends, Bevelled Ends |
| Finishing | Annealing Pickling, As Welded |
| Form | Round |
| Application | Liquid Transportation, Pressure Equipment |
ASTM A312 TP304L Chemical Composition
304L is low carbon 304 Austenitic stainless steel, with carbon content not exceeding 0.035%, and excellent corrosion resistance suited to a wide range of applications, in Europe, the equivalent steel is 1.4307.
| C | Mn | P | S | Si | Ni | Cr | N | |
|---|---|---|---|---|---|---|---|---|
| TP304L | 0.035 | 2.00 | 0.045 | 0.030 | 1.0 | 8-13 | 18-20 | |
| 1.4307 | 0.030 | 0.80 | 0.040 | 0.015 | 1.0 | 8-10 | 17.5-19.5 | 0.11 |
ASTM A312 TP304L Mechanical Properties
| Tensile Strength(Mpa) Min | Yield Strength(Mpa) Min | Elongation(%) | Hardness (HRB) Max | |
|---|---|---|---|---|
| TP304L | 485 | 170 | 35 | 90 |
| 1.4307 | 480-680 | 180 | 35 | 90 |
ASTM A312 TP304L Stainless Steel Pipe
ASTM A312 covers seamless, straight-seam welded, and heavily cold-worked welded stainless steel pipe, when larger diameter welded pipes, welding two longitudinal sections are allowed.
ASTM A312 seamless pipe size range from NPS 1/8 inch to 30 inch with Wall thickness from Sch5 to Sch160 depending on ANSI Pipe Schedule B36.19 & B36.10, manufactured starting from billet by cold drawn & cold rolling process, besides TP304L, other grades include 304, 316L, 321/321H, 317/317L, S31803/2205, 904L and duplex steel, common finish in annealing and pickling, plain ends and beveled ends for chosen to meet specific requirement.
ASTM A312 Stainless Steel Pipe Tolerance
| OD | Tolerance | WTH（Mm) |
|---|---|---|
| 10.3-48.3 | +0.40/-0.80 | +/-12.5%T |
| ＞48.3-114.3 | +0.80/-0.08 | |
| ＞114.3-219.1 | +1.60/-0.80 | |
| ＞219.1-457.2 | +2.40-0.80 | |
| ＞457.2-660.4 | +3.20/-0.80 | |
| ＞660.4-864 | +4.00/-0.08 | |
| ＞864-1219.2 | +4.80/-0.08 |
Testing And Inspection For Welded Pipe:
ISO9001:2008 & PED approved manufacturer with more than 10 years experience in TP304L stainless steel seamless pipe, mill test certificate offered as EN10204/3.1, quality control from raw material to final products, testing and inspection comply with the specification, standard testing and optional testing as following, The third party testing accepted, like TUV, SGS, INTERTEC, and BV, to ensure our products high quality.
- Mechanical Tests
- Grain Size Determinations
- Weld Decay Tests
- Transverse or Longitudinal Tension Test
- Flattening Test
- Grain Size
- Hydrostatic or Nondestructive Electric Test
- Flattening Test(option)
- Radiographic Examination(option)
- Intergranular Corrosion Test(option)