ASTM A312 TP304L Welded Stainless Steel Pipe

ASTM A312 TP304L welded stainless steel pipe is used for high-temperature and general corrosive service, Stainless Steel 304L Welded Pipe is manufactured by welding pipes longitudinally in place as a high voltage current is passed through the pipe without any requirement of filler material. ASTM A312 Grade 304L can be designed in outside diameter 3/8 to 42 inches as per ANSI B36.10 and ANSI B36.19, Schedule rang from Sch 5 to Sch 160,

SpecificationASTM A312, ASME SA312
GradesTP304L, SS 304L
NPS1/8″ – 42″ inches
ScheduleSch 5 to Sch 160
Lengthmax 30000 mm
EndsPlain ends, bevelled ends
FinishesAnnealing pickling, as welded, polished
ShapeRound Pipe

ASTM A312 TP304L Chemical Composition

ASTM A312 TP304L stainless steel is low carbon TP304 grade, carbon content not exceeding 0.035%, it is the18-8 austenitic stainless steel material grade, having excellent corrosion resistance.

GradeCMnPSSiNiCrN
TP304L0.0352.000.0450.0301.08-1318-20

ASTM A312 TP304L Mechanical Properties

GradeTensile strength(Mpa) minYield strength(Mpa) minElongation(%)Hardness (HRB) max
TP304L4851703590

ASTM A312 TP304L Equivalent Grades

GRADEUNSENJISWERKSTOFF NR.GOST
 USAEUROPEJAPANGERMANRUSSIAN
SS 304LS30403X2CrNi18-9SUS 304L1.430703Х18Н11

ASTM A312 Stainless Steel Pipe Tolerance

ODTolerance of ODWTH（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

  • 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)