Seamless Stainless Steel Pipe/ Tubo sin soldadura de acero inoxidable

Seamless stainless steel pipe is made of steel ingot by piercing and then made by hot rolling, cold rolling or cold drawing.

1. Seamless Hot Rolling Processes
Round Pipe Billet → Heating → Perforation → Three Roll Skew Rolling, Continuous Rolling or Extrusion → Off Pipe → Sizing (Or Reducing Diameter)→ Cooling → Billet → Straightening → Water Pressure Test ( Or Flaw Detection) → Marking → Storage
2. Seamless Cold Rolling (Cold drawn) Processes
Round Pipe Billet → Heating → Perforation → Head → Annealing → Pickling → Oil (Copper) → Multi Pass Drawing (Cold Rolling) → Billet → Heat Treatment → Straightening → Water Pressure Test → Marking → Storage

Application: Seamless stainless steel pipe is widely used in boilers, central air conditioning, steel structure, machining, pipeline gas, fire protection, petroleum, chemical industry, medical, power and other industry fields, with high temperature resistant, low temperature resistant, corrosion.

Main Standard: ASTM A213, ASTM A312, ASTM A269

Main Grade: 304, 304L, 316, 316L, 321, 310, 310S, 347, 347H, 904L, 2205; 1.4301, 1.4306, 1.4401, 1.4404, 1.4541, 1.4845, 1.455, 1.4912, 1.4539

Outer Diameter: 6-325mm

Wall Thickness: 0.5-35mm

Length: Random

Surface Treatment: pickling or as customers’ requirement

How is it Measured? Outer Diameter (A) X Schedule or Wall Thickness (B) X Length

PS: Advantages Of Seamless Tubes & Pipes

A. Heavy and thick wall thickness
B. No weld seam. Generally be considered as better properties and corrosion resistance
C. Better ovality, or roundness

Type Grade of Steel Size Standard
DIN17006 DIN17007
Seamless Stainless Steel Pipe 0Cr18Ni9 304/S30400 SUS304 X5CrNi18-10 1.4301 OD 6-630mm

WT 0.5-28mm

00Cr19Ni10 304L/S30403 SUS304L X2CrNi19-11 1.4306 GB/T14976-2002
00Cr25Ni20 310S/31008 SUS310S X12CrNi25-21 1.4845 GB13296-91
0Cr17Ni12Mo2 316/S31600 SUS316 X5CrNiMo17-12-2 1.4401
00Cr17Ni14Mo2 316L/S31603 SUS316L X2CrNiMo18-14-3 1.4435 ASTM A213/A213M
0Cr19Ni13Mo3 317/S31700 SUS317 X5CrNiMo11-13-3 1.4449 ASTM A312/312M
00Cr19Ni13Mo3 317S/S31703 SUS317L X2CrNiMo18-16-4 1.4438 JIS G3459
1Cr18Ni9Ti 321/S32100 SUS321 X12CrNiTi18-9 1.4878 DIN2462
0Cr18Ni10Ti X6CrNiTi18-10 1.4541
0Cr18Ni11Nb 347/S34700 SUS347 X12CrNiNb18-10 1.4550


Item No. Steel Grades Main Steel Codes
1 Austenite 301, 310S, 304, 316, 316L, 316Ti, 317, 321, 347H, 904L
2 Ferrite 430
3 Bio-phase S31803, S2205

304, 304L, 316, 316L are the four most popular austenitic grades of stainless steel piping which provide excellent corrosion resistance.

Material is stocked in the annealed and pickled, bright annealed, mill finish and polished conditions.