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Stainless Steel Pipe
ASTM A312 Stainless Steel Pipe
Type: seamless cold drawn tubes, hot finished seamless pipes, welded pipes
OD: seamless: 10.3mm to 610mm, welded: 10.3mm to 914mm
Length: 0-12m
WT: 0.2mm-60mm
Standard: astm a312, asme sa312
Grades: tp304, tp304l, tp304h, tp321h, tp321, tp316, tp316l,
Thickness: sch 5/5s, 10/10s, 20/20s, 40/40s, 80/80s, 120/120s, 160/160s
Finish: no.1 pickled finish, no.4 finish, ba finish, electropolished seamless pipes
End: plain (square cut) / beveled to 30° / NPT thread as ANSI B1.20.1 / BSPT thread as ISO 7-1
Surface: pickling white / No.2B matte finish
Standard
Specification
ASTM A312 pipe is the general use stainless steel pipe applied in different industries. It covers diameters from 1/8” to 30” and thickness from SCH 10S to SCH 80S. Common use material grades are TP304/304L, TP316/316L.
The standard specifications include seamless, straight seam welded and heavily cold welded austenitic stainless steel pipe for high temperature and general corrosive service. There are several grades in this standard, and each steel grade shall confirm to the required chemical composition of C, Mn, P, S, Si, Cr and Cr, Ni, Mo, etc. All Astm A312 stainless steel pipes shall be furnished in the heat-treated condition in accordance with the required heat treating temperature and cooling/testing requirements. And also need to comply to the required tensile strength and yield strength.
Application:
Kitchen benches, sinks, troughs, equipment and appliances
Architectural paneling, railings & trim
Chemical containers, including for transport
Heat Exchangers
Woven or welded screens for mining, quarrying & water filtration
Threaded fasteners
Water Supply Systems
Power Plant
Paper and pulp Industry
General Purpose Applications
Fabrication Industry
Food Processing Industry
Industrial Structural Project
Oil and Gas Pipeline
Chemical Industry
Plumbing Industrial
Dimension:
Group |
Grade |
Type |
Total elongation under load % |
Yield strength Mpa |
Tensile strength min MPa |
Hardness max |
||
min |
max |
HRC |
HBW |
|||||
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
1 |
J55 |
- |
0.5 |
379 |
552 |
517 |
- |
- |
K55 |
- |
0.5 |
379 |
552 |
655 |
- |
- |
|
N80 |
1 |
0.5 |
552 |
758 |
689 |
- |
- |
|
N80 |
Q |
0.5 |
552 |
758 |
689 |
- |
- |
|
2 |
L80 |
1 |
0.5 |
552 |
655 |
655 |
23 |
241 |
L80 |
9Cr |
0.5 |
552 |
655 |
655 |
23 |
241 |
|
L80 |
13Cr |
0.5 |
552 |
655 |
655 |
23 |
241 |
|
C90 |
|
0.5 |
621 |
724 |
689 |
25.4 |
255 |
|
C95 |
- |
0.5 |
655 |
758 |
724 |
- |
- |
|
T95 |
|
0.5 |
655 |
758 |
724 |
25.4 |
255 |
|
3 |
P110 |
- |
0.6 |
758 |
965 |
862 |
- |
- |
4 |
Q125 |
All |
0.65 |
862 |
1034 |
931 |
- |
- |
Mechanical Properties:
Label |
D Outside diameter mm |
Wall thickness t mm |
C Type of end-finish |
|||||||||
1 |
2 |
H40 |
J55 |
L80 |
N80 1Q |
C90 |
T95 |
P110 |
||||
NU T&C |
EU T&C |
IJ |
||||||||||
1 |
2 |
3 |
4 |
5 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
1.9 |
2.75 |
2.9 |
2.76 |
48.26 |
3.68 |
PNUI |
PNUI |
PNUI |
PNUI |
PNUI |
PNUI |
- |
1.9 |
3.65 |
3.73 |
- |
48.26 |
5.08 |
PU |
PU |
PU |
PU |
PU |
PU |
PU |
1.9 |
4.42 |
- |
- |
48.26 |
6.35 |
- |
- |
P |
- |
P |
P |
- |
2.375 |
4 |
- |
- |
60.32 |
4.24 |
PU |
PN |
PN |
PN |
PN |
PN |
- |
2.375 |
4.6 |
4.7 |
- |
60.32 |
4.83 |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
2.375 |
5.8 |
5.95 |
- |
60.32 |
6.45 |
- |
- |
PNU |
PNU |
PNU |
PNU |
PNU |
2.375 |
6.6 |
- |
- |
60.32 |
7.49 |
- |
- |
P |
- |
P |
P |
- |
2.375 |
7.35 |
7.45 |
- |
60.32 |
8.53 |
- |
- |
PU |
- |
PU |
PU |
- |
2.875 |
6.4 |
6.5 |
- |
73.02 |
5.51 |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
2.875 |
7.8 |
7.9 |
- |
73.02 |
7.01 |
- |
- |
PNU |
PNU |
PNU |
PNU |
PNU |
2.875 |
8.6 |
8.7 |
- |
73.02 |
7.82 |
- |
- |
PNU |
PNU |
PNU |
PNU |
PNU |
2.875 |
9.35 |
9.45 |
- |
73.02 |
8.64 |
- |
- |
PU |
- |
PU |
PU |
- |
2.875 |
10.5 |
- |
- |
73.02 |
9.96 |
- |
- |
P |
- |
P |
P |
- |
3.5 |
7.7 |
- |
- |
88.9 |
5.49 |
PN |
PN |
PN |
PN |
PN |
PN |
- |
3.5 |
9.2 |
9.3 |
- |
88.9 |
6.45 |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
3.5 |
10.2 |
- |
- |
88.9 |
7.34 |
PN |
PN |
PN |
PN |
PN |
PN |
- |
3.5 |
12.7 |
12.95 |
- |
88.9 |
9.52 |
- |
- |
PNU |
PNU |
PNU |
PNU |
PNU |
3.5 |
14.3 |
- |
- |
88.9 |
10.92 |
- |
- |
P |
- |
P |
P |
- |
3.5 |
15.5 |
- |
- |
88.9 |
12.09 |
- |
- |
P |
- |
P |
P |
- |
4 |
9.5 |
- |
- |
101.6 |
5.74 |
PN |
PN |
PN |
PN |
PN |
PN |
- |
4 |
10.7 |
11 |
- |
101.6 |
6.65 |
PU |
PU |
PU |
PU |
PU |
PU |
- |
4 |
13.2 |
- |
- |
101.6 |
8.38 |
- |
- |
P |
- |
P |
P |
- |
4 |
16.1 |
- |
- |
101.6 |
10.54 |
- |
- |
P |
- |
P |
P |
- |
4.5 |
12.6 |
12.75 |
- |
114.3 |
6.88 |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
- |
4.5 |
15.2 |
- |
- |
114.3 |
8.56 |
- |
- |
P |
- |
P |
P |
- |
Process
a. Seamless Pipe (SMLS): It covers stainless steel seamless pipe that manufactured in any process that can not be involved in the welding process.
b. Welded Pipe (WLD): It covers welded pipe that manufactured by an automatic welding process that does not add filler metal during welding.
c. Cold Worked Pipe (HCW pipe): The heavy cold-worked pipe that apply cold working of not less than 35% reduction in thickness of both wall, and welded to the welded pipe prior to final annealing. Do not use fillers during welding.
d. Welded and HCW pipe: Welded pipe and HCW pipe of 14 and smaller than NPS 14 shall have a single longitudinal weld. After approval by the purchaser, the welded pipe and HCW pipe with an NPS greater than NPS 14 shall have a single longitudinal weld or shall be manufactured by forming and welding two longitudinal sections of flat stock. So each welds are to be tested, inspected, inspected or treated.
ASTM A312 pipe shall be free from oxide scale and contaminated iron filings. If the steel pipe is brightly annealed, and pickling, blasting or surface finishing may not be mandatory. The purchaser can request that the finished pipe shall do passivating treatment.
Heat Treatment Methods: ASTM A312 stainless steel pipes shall be furnished in heat treatment condition comply to table 2 of ASTM A312. In case of seamless types, immediately following hot forming while the temperature of the pipes is not less than the minimum solution treatment temperature specified in this table, pipes shall be individually quenched in water or rapidly cooled by other means (direct quenched).