A312 304 & 316 Stainless Steel Pipe

Technical Information View All Pipe

ASTM A312 Stainless Steel Pipe can be either seamless or welded and is intended for high temperature and corrosive service.

ASTM A312 Stainless Steel Pipe conforms to industry standard sizes, which are summarized in MSI’s Pipe Chart (link here).  Further technical information, specific to ASTM A312 is explained in more detail in the tables below.

MSI Supply is a Pipe Distributor in Houston, TX that provides stainless steel pipe from 1/2" to 24" in diameter, in grades 304 and 316, in both welded and seamless construction.

STAINLESS STEEL PIPE ORDERING INFORMATION

REQUIRED INFORMATION FOR ORDERING 304 or 316 Stainless Steel Pipe

Characteristic What to Specify
Quantity Feet or number of lengths
Size NPS (Outside Diameter) and Schedule Number (Average Wall Thickness)
Grade TP304TP316, TP321, TP347
Construction Seamless or Welded

 

STAINLESS STEEL PIPE MANUFACTURING CONSIDERATIONS

Normally furnished in square cut ends, stainless steel pipe with beveled ends can be provided. Spot radiography or 100% radiography can be provided on all weld seams. Stainless Steel pipe is pickled and passivated as per ASTM A380 to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation.

A312 WELDED & SEAMLESS PIPE - REFERENCE: ASME SA312
Nom Pipe Size (in.) Tolerances
O.D. Wall & Weight Cut Length
1/8 to 1-1/2" +.015" 12-1/2% max under nom. wall thickness + 1/4" - 0
-.031"
2 to 4" +.031"
-.031"
5 to 8" +.062"
-.031"
10 to 12" +.093"
-.031"
Tests per A312 and A530.    
Flatten to H = (1 + .09) t / (.09 + 1/D)
D = nom O.D. t= nom. wall.
Yield strength: 25 -55 Ksi. See specification for grade.
Tensile strength: 70 - 100 Ksi. See specification for grade.
Elongation in 2" min: 35% (longitudinal) 25% (traverse)
Hydrotest: P = 2St/D 2500 psi max for 3.5" and under, and 2800 psi for sizes over 3.5". S = 50% of min Y.S.

 

Grades

  C
(max %)
Mn
(max %)
Si
(max %)
P
(max %)
S
(max %)
Cr Ni N
(max %)
304 0.07 2 0.75 0.045 0.03 18-20 8-10.5
304L 0.03 2 0.75 0.045 0.03 18-20 8-10.5 0.1

 

  C
(max %)
Mn
(max %)
Si
(max %)
P
(max %)
S
(max %)
Cr Mo Ni N
(max %)
316 0.08 2 0.75 0.045 0.03 16-18 2-3 10-14 0.1
316L 0.03 2 0.75 0.045 0.03 16-18 2-3 10-14 0.1

 

STAINLESS STEEL PIPE MANUFACTURERS OFFERED BY MSI SUPPLY

Domestic Mills

  • PEXCO
  • Sandvik

Import Mills

  • Changwon
  • DMV
  • Kobe
  • Nantong
  • Productos Tubulares
  • Schoeller- Bleckmann
  • Sumitomo
  • Tubacex
  • Walsin