ASTM A312 304/304L Welded Stainless Steel Pipe

Dongshang Stainless produce seamless and welded stainless steel pipe complying with ASTM A312 specification, intending for high-temperature and general corrosive service, custom stainless steel grade 304/304L, and also other grades, size range as ANSI B36.10, ANSI B36.19.

Basic specification
  • NPS: 1/8″ – 24″
  • Schedule: Sch 5 to Sch 160
  • Length: max 22000 mm
  • Ends: plain ends, bevelled ends
  • Specification:ASTM A312, ASTM A312M
  • Grades: 304/340L, 316/316L, 321, 310S, 904L, S31803
  • Finishing: bright annealing, as welded, annealing, polishing.
  • Form: round

ASTM A312 welded 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
316L stainless steel welded pipeA312 304 304L Welded Stainless Steel PipeA312 seamless stainless steel pipe

A312 Stainless steel grades

Grades Chemical composition % by mass max unless stated
UNS No SAE No AISI No. C Si Mn P S Cr Mo Ni Others
S30100 30301 301 0.15 1.00 2.00 0.045 0.030 16.0/18.0 6.0/8.0 N 0.10
S30103 301L 0.03 1.00 2.00 0.045 0.030 16.0/18.0 6.0/8.0 N 0.20
S30153 301LN 0.03 1.00 2.00 0.045 0.030 16.0/18.0 6.0/8.0 N 0.07/0.20
S30200 30302 302 0.15 0.75 2.00 0.045 0.030 17.0/19.0 8.0/10.0 N 0.10
S30215 30302B 302B 0.15 2.00/ 3.00 2.00 0.045 0.030 17.0/19.0 8.0/10.0
S30300 30303 303 0.15 1.00 2.00 0.20 0.15 min 17.0/19.0 8.0/10.0
S30310 XM-5 (303Plus x) 0.15 1.00 2.50/4.50 0.20 0.25 min 17.00/19.00 7.00/9.00
S30323 30303Se 303Se 0.15 1.00 2.00 0.20 0.060 17.0/19.0 8.0/10.0 Se 0.15 min
S30330 303Cu 0.15 1.00 2.00 0.15 0.10 min 17.0/19.0 6.0/10.0 Cu 2.5/4.0; Se 0.10
S30400 30304 304 0.07 0.75 2.00 0.045 0.030 17.5/19.5 8.0/10.5 N 0.10
S30400 A276 for bar 30304 304 0.08 1.00 2.00 0.045 0.030 18.0/20.0 8.0/11.0
S30403 30304L 304L 0.030 0.75 2.00 0.045 0.030 17.5/19.5 8.0/12.0 N 0.10
S30403 A276 for bar 30304L 304L 0.030 1.00 2.00 0.045 0.030 18.0/20.0 8.0/12.0
S30430 302HQ 0.03 1.00 2.00 0.045 0.030 17.0/19.0 8.0/10.0 Cu 3.0/4.0
S30452 XM-21 (304HN) 0.08 1.00 2.00 0.045 0.030 18.0/20.0 8.00/10.00 N 0.16/0.30
S30453 304LN 0.030 0.75 2.00 0.045 0.030 18.0/20.0 8.0/12.0 N 0.10/0.16
S30454 0.03 1.00 2.00 0.045 0.030 18.0/20.0 8.0/11.0 N 0.16/0.30
S30500 30305 305 0.12 0.75 2.00 0.045 0.030 17.0/19.0 10.5/13.0
S30800 30308 308 0.08 1.00 2.00 0.045 0.030 19.0/21.0 10.0/12.0
S31600 30316 316 0.08 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 N 0.10
S31603 30316L 316L 0.030 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 N 0.10
S31635 316Ti 0.08 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 Ti 5x (C+N) / 0.70 N 0.10
S31640 316Cb 0.08 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 Nb 10x C / 1.10 N 0.10
S31653 316LN 0.030 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 N 0.10/0.16
S31700 30317 317 0.08 0.75 2.00 0.045 0.030 18.0/20.0 3.0/4.0 11.0/15.0 N 0.10
S31703 317L 0.030 0.75 2.00 0.045 0.030 18.0/20.0 3.00/4.00 11.0/15.0 N 0.10
S31725 317LM 0.030 0.75 2.00 0.045 0.030 18.0/20.0 4.0/5.0 13.5/17.5 N 0.20
S31726 317LMN 0.030 0.75 2.00 0.045 0.030 17.0/20.0 4.0/5.0 13.5/17.5 N 0.10/0.20
S31753 317LN 0.030 0.75 2.00 0.045 0.030 18.0/20.0 3.0/4.0 11.0/15.0 N 0.10/0.22
S32100 30321 321 0.08 0.75 2.00 0.045 0.030 17.0/19.0 9.0/12.0 Ti 5 x C min/0.70 N 0.10
S34700 30347 347 0.08 0.75 2.00 0.045 0.030 17.0/19.0 9.0/13.0 Nb+Ta 10 x C min/1.0
S34720 347F 0.08 1.00 2.00 0.040 0.18/0.35 17.00/19.00 0.75 9.00/12.00 Nb 10xC / 1.10; Cu 0.75; Ta 0.05
S34723 347FSe 0.08 1.00 2.00 0.11/0.17 0.030 17.00/19.00 0.75 9.00/12.00 Nb 10xC / 1.10; Cu 0.75; Se 0.15/0.35; Ta 0.05
S34800 30348 348 0.08 0.75 2.00 0.045 0.030 17.0/19.0 9.00/13.0 Nb+Ta 10 x C / 1.00; Ta:0.10 max; Co 0.20
S38400 30384 384 0.04 1.00 2.00 0.045 0.030 15.0/17.0 17.0/19.0

testing and inspection for welded stainless steel pipe:

  • 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)

ASTM A312 covers seamless, straight-seam welded, and heavily cold worked welded stainless steel pipe, when larger diameter welded pipes, welding two longitudinal sections is allowed.