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

ASTM A312 pipe covers following manufacturing types (Including hot finished or cold finished):

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).

Packing

  • OD 219mm and above  Loose + pipe cap + two nylon slings

    OD 219mm and above Loose + pipe cap + two nylon slings

  • OD below 219mm (Bundled) Hexagonal packing + steel belts bundled + pipe cap + woven bags + two nylon slings

    OD below 219mm (Bundled) Hexagonal packing + steel belts bundled + pipe cap + woven bags + two nylon slings

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