Seamless Stainless Steel Pipe 304 / 304L / 316 / 316L

DONGSHANG STAINLESS produce seamless stainless steel pipe complying with specification A213, A269, A312, A511, stainless steel grades include 304/304L, 316/316L, 321, 347H, 310S, 904L, 2205, annealing pickling, bright annealing condition, applied for General service, Curatorial Industry, Food and beverage Industry, Dorative and construct, Aerospace Industry, Chenmical and Petrochemical, Fluid transport, Water treatment, Boiler, heat exchanger, Oil and gas service, Mechanical and fabrication purpose.

Basic specification
  • Type: seamless pipe
  • Specification: A213, A269, A312, A511
  • Grades: TP304, TP304L, TP316L
  • NPS: 1/8″ – 24″
  • Sch: Sch5 – Sch160
  • Length: specific or random
  • Condition: annealing, beight annealing, polishing
  • Form:: round, U bending, coiled
  • Application: heat exchanger, boiler, water, high pressure, ornamental purpose
  • Method: Cold rolling, cold drawn
  • Seamless Stainless Steel Pipe
  • 304 304L seamless stainless steel pipe

TP304, TP340L stainless steel

Grade C Mn P S Si Ni Cr
TP304 0.08 2.00 0.045 0.030 1.0 8-11 18-20
TP304L 0.035 2.00 0.045 0.030 1.0 8-13 18-20

TP316, TP316L stainless steel

C Mn P S Si Ni Cr Mo Ti N Nb
316 0.08 2.00 0.045 0.030 1.0 11-14 16-18 2-3      
316L 0.035 2.00 0.045 0.030 1.0 10-14 16-18 2-3      
Other stainless steel grades offered.

Standards for seamless stainless steel pipe

  • ASTM A213 – Seamless Ferric and Austenitic Alloy-Steel Boiler, Su[per heater, and Heat-Exchanger Tubes
  • ASTM A268 – Seamless and Welded Stainless Steel Tubing
  • ASTM A269 – Seamless and Welded Stainless Steel Tubing
  • ASTM A270 – Seamless and Welded Stainless Steel Sanitary Tubing
  • ASTM A312 – Seamless, Welded, and Heavily Cold Worked Stainless Steel Pipes
  • ASTM A511 – Seamless Stainless Steel Mechanical Tubing
  • ASTM A789 – Seamless and Welded Stainless Steel Tubing
  • ASTM A790 – Seamless and Welded Stainless Steel Pipe

seamless stainless steel pipe standard tolerance

Spcification O.D(mm) W.T(mm) L(mm)
GB13296 6~30 ±0.15/-0.2 1~3 +20% -0% 0~10
>30~50 ±0.3 >3 +22% -0%
>50 ±0.75% also average wall
GB/T14976 6~10 ±0.15 1~3 +12.5% -10% 0~10
10~30 ±0.2 >3 +10%
30~50 ±0.3
>50 ±0.8%
ASTM A312
ASME SA312
3.175~38.1 +0.4/-0.8 +~+6
38.1~101.6 +0.8/-0.8 +20% -12.5%
101.6~203.2 +1.6/-0.8
203.2~457.2 +2.4/-0.8
ASTM A213
ASME SA213
≤25.4 ±0.10 +20% 0% OD<50.8,
+3mm
25.4~38.1 ±0.15 OD>50,
WT>5.6,
A.W±10%
38.1~50.8 ±0.2 OD≥50.8,
+5mm
50.8~63.5 ±0.25
63.5~76.2 ±0.3 also A.W
76.2~101.6 ±0.38
ASTM A269 <12.7 ±0.13 ±15% 0~+3.2
12.7~38.1 ±0.13 ±10% 0~+3.2
38.1~88.9 ±0.25 ±10% 0~+4.8
88.9~139.7 ±0.38 ±10% 0~+4.8
ASTM A789 <12.7 ±0.13 ±15% 0~+3
12.7~38.1 ±0.13 ±10% 0~+3
38.1~88.9 ±0.25 ±10% 0~+5
88.9~139.7 ±0.38 ±10% 0~+5
139.7~203.2 ±0.76 ±10% 0~+5
ASTM A790 3.175~38.1 +0.4/-0.8 +20% -12.5% +~+6
38.1~101.6 +0.8/-0.8
101.6~203.2 +1.6/-0.8
203.2~457.2 +2.4/-0.8

General testing for seamless stainless steel pipe

  • Intergranular corrosion testing acc. to ASTM A262-Practise E latest edition
  • 100% hydrostatic pressure testing or Eddy current test
  • 100% material identity testing
  • The chemical composition shall be in accordance with the requirements of ASTM -A999 and the relevant product standard.
DONGSHANG STAINLESS carry out YNGXING SPECIAL STEEL’s products, best stainless steel billet manufacture and supplier in China, annealing pickling, bright annealing condition in various sizes, high quality cold finished seamless stainless steel pipe and tube for international market.