Welded Steel Pipe

ASTM A691 Steel Pipe

Size: 12.4mm to 1219mm(LSAW, SSAW, HSAW)

Range of Length: 5.8m to 11.8m, 6m to 12m.

Ends Procession: plain, beveled, threaded

Application: petroleum, chemical plant, power sector, gas industry, hardware tools, metallurgy,machinery, construction, shipbuilding

Standard and Grades: ASTM A691 1-1/4CR, 2-1/4CR, 2-1/4CR, 3CR, 5CR, 9CR, 91

Wall Thickness: SCH 2o, SCH 40, SCH STD, SCH 80, SCH XS, SCH 160, up to 3 inch

Length: 6 meters, 12 meters or customized.

Surface Treatment: Painted, Natural, 3PE, FBE

Standard

Specification

ASTM A691 covers carbon and alloy steel pipe, electric-fusion-welded with filler metal added, fabricated from pressure-vessel-quality plate of several analyses and strength levels and suitable for high-pressure service at high temperatures. Heat treatment may or may not be required to attain the desired mechanical properties.

ASTM A691 are classified according to steel grades and are designated in classes according to the type of heat treatment performed in the pipe manufacture, whether the weld is radiographically examined, and whether the pipe has been pressure tested. The ASTM A691 steel welds shall be made either manually or automatically by an electric process involving the deposition of filler metal.

The welded joints shall have positive reinforcement at the center of each side of the weld. The contour of this reinforcement shall be smooth, and the deposited metal shall be fused smoothly and uniformly into the plate surface.

The joints shall undergo tension, bend and pressure tests. Unacceptable surface imperfections shall be removed by grinding or machining. The depression after grinding or machining shall be blended uniformly into the surrounding surface. Repair of weld and base metal defects shall be done by welding.


Specification

Grade

Alloy Steel ASTM A691 Cl22, A691 GRADE 1 CR, GRADE 1/2 CR, GRADE 1 1/4 CR, GRADE 2 1/4 CR,
GRADE 3 CR, GRADE 5 CR, GRADE 9 CR, GRADE 91, CM 65, CM 70, CM 75

Size

1/2” NB to 36” NB

Thickness

3-12mm

Schedules

SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS

Class Designation

Class 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 34, 40, 41, 42, 43, 50,
51, 52, 53, 60, 61, 62, 63, 70, 71, 72, 73

ASTM A691 Grades

ASTM A691 Gr 11, ASTM A691 Gr.91, ASTM A691 9cr, ASTM A691 5cr, ASTM A691 1 1/4cr Cl22, ASTM A691m,
ASTM A691 Gr.5cr Cl22, ASTM A691 Cm70, ASTM A691 Class 22, ASTM A691 Class 42, ASTM A691-91, ASTM A691 Grade 2.1/4cr, ASTM A691 11/4cr Cl22

Origin

European, Japanese, Korean, US, Russian, Indian (Strictly No Chinese Material)

Tolerance

Cold drawn pipe: +/-0.1mm

Cold rolled pipe: +/-0.05mm

Craft

Cold rolled and Cold drawn

Type

Seamless / ERW / Welded / Fabricated / LSAW Pipes

available in Form of

Round, Square, Rectangular, Hydraulic Etc.

Length

Standard
Double &
In Cut length also.

End

Plain End, Beveled End, Treaded

Specialized in

Large Diameter ASTM A691 Pipe

Additional Testing

NACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc.

Application

Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service


ASTM A691 Pipe Chemical Composition

Chemical Composition of A691 1-1/4CR, 2-1/4CR, 5CR, 9CR, 91 Alloy STEEL EFW PIPEs


1CR

1-1/4CR

2-1/4 CR

5 CR

9 CR

91

C

0.05-0.17

0.05-0.17

0.05-0.15

0.15

0.15

0.08-0.12

Mn

0.40-0.65

0.40-0.65

0.30-0.60

0.30-0.60

0.30-0.60

0.30-0.60

P

0.025

0.025

0.025

0.025

0.025

0.020

S

0.025

0.025

0.025

0.025

0.025

0.010

Si

0.15-0.40

0.50-0.80

0.50

0.50

1.00

0.20-0.50

Cr

0.80-1.15

1.00-1.50

2.00-2.50

4.00-6.00

8.00-10.00

8.00-9.50

Mo

0.45-0.60

0.45-0.65

0.90-1.10

0.45-0.65

0.90-1.10

0.85-1.05

V

0.04

0.18-0.25

*Grade 91 also includes restrictions on Nickel 0.40 max, Columbium 0.06-0.10, Nitrogen 0.030-0.070, Aluminium 0.02 max, titanium 0.01 max, Zirconium 0.01 max.


ASTM A691 Pipe Equivalent

Pipe Grade

Type of Steel

ASTM Specification

HB, max

Number

Grade

CM-65

carbon-molybdenum steel

A204/A204M

A

201

CM-70

carbon-molybdenum steel

A204/A204M

B

201

CM-75

carbon-molybdenum steel

A204/A204M

C

201

CMSH-70

carbon-manganese-silicon steel, normalized

A537/A537M

1


CMS-75

carbon-manganese-silicon steel

A299/A299M

CMSH-80

carbon-manganese-silicon steel, quenched and tempered

A537/A537M

2


1/2 CR

1/2 % chromium, 1/2 % molybdenum steel

A387/A387M

2

201

1 CR

1 % chromium, 1/2 % molybdenum steel

A387/A387M

12

201

1 1/4 CR

1 1/4 % chromium, 1/2 % molybdenum steel

A387/A387M

11

201

2 1/4 CR

2 1/4 % chromium, 1 % molybdenum steel

A387/A387M

22

201

3 CR

3 % chromium, 1 % molybdenum steel

A387/A387M

21

201

5 CR

5 % chromium, 1/2 % molybdenum steel

A387/A387M

5

225

9 CR

9 % chromium, 1 % molybdenum steel

A387/A387M

9

241

91

9 % chromium, 1 % molybdenum, vanadium, columbium

A387/A387M

91

241

A Class I is Other Than Killed with a specified minimum tensile strength of 450 MPa or lower.

Class II is Other Than Killed with a specified minimum tensile strength of 450 to 520 MPa incl.

Class III is Killed with a specified minimum tensile strength of 450 MPa or lower.

Class IV is Killed with a specified minimum tensile strength of 450 to 520 MPa incl.

Class V is Killed with a specified minimum tensile strength of over 520 MPa to but not including 655 MPa.

Class VI is Killed with a specified minimum tensile strength of 655 MPa or over.

B Full size (10 by 10 mm) specimens.

C Testing temperature as specified in the purchase order, but no higher than 0°C


ASTM A691 Pipe Mechanical Properties

A691 1-1/4CR, 2-1/4CR, 5CR, 9CR, 91 Alloy Steel EFW LSAW Pipes Class

Class

Heat Treatment on Pipe Section see:

Radiography,
see Section

Pressure
Test, see :

10

none

none

none

11

none

9

none

12

none

9

8.3

13

none

none

8.3

21

stress relieved, see 6.3.1

none

none

21

stress relieved, see 6.3.1

9

none

ASTM A691 Class 22

stress relieved, see 6.3.1

9

8.3

23

stress relieved, see 6.3.1

none

8.3

31

normalized, see 6.3.2

none

none

31

normalized, see 6.3.2

9

none

32

normalized, see 6.3.2

9

8.3

33

normalized, see 6.3.2

none

8.3

40

normalized and tempered, see 6.3.3

none

none

43

normalized and tempered, see 6.3.3

9

none

43

normalized and tempered, see 6.3.3

9

8.3

43

normalized and tempered, see 6.3.3

none

8.3

50

quenched and tempered, see 6.3.4

none

none

51

quenched and tempered, see 6.3.4

9

none

52

quenched and tempered, see 6.3.4

9

8.3

53

quenched and tempered, see 6.3.4

none

8.3

60

normalized and precipitation heat none none treated

none

none

61

normalized and precipitation heat none none treated

9

none

62

normalized and precipitation heat none none treated

9

8.3

63

normalized and precipitation heat none none treated

none

8.3

70

normalized and precipitation heat none none treated

none

none

71

normalized and precipitation heat none none treated

9

none

72

normalized and precipitation heat none none treated

9

8.3

73

normalized and precipitation heat none none treated

none

8.3


Heat Treatment of A691 Material

Pipe Grade

ASTM Specification

Post-Weld Heat-Treat Temperature Range (Stress Relieving), °F (°C)

Normalizing Temperature max unless otherwise noted,

Quenching Temperature max unless otherwise noted,°F (°C)

Tempering Temperature, min, °F (°C)

CM-65

A 204/A 204M

1100 to 1200 (590 to 650)

1700 (925)

CM-70

A 204/A 204M

1100 to 1200 (590 to 650)

1700 (925)

CM-75

A 204/A 204M

1100 to 1200 (590 to 650)

1700 (925)

CMSH-70

A 537/A 537M

1100 to 1200 (590 to 650)

1700 (925)

CMS-75

A 299/A 299M

1100 to 1200 (590 to 650)

1700 (925)

CMSH-80

A 537/A 537M

1100 to 1200 (590 to 650)

A

1700( 925)

1100 to 1250 (590 to 675)

1/2CR

A 387/A 387M

1100 to 1300 (590 to 705)

1850 (1010)

1700( 925)

150 to 1375 (620to745)

1CR

A 387/A 387M

1100 to 1350 (590 to 730)

1850 (1010)

1700 (925)

150 to 1375 (620to745)

11⁄4CR

A 387/A 387M

1100 to 1375 (590 to 745)

1850 (1010)

1700 (925)

150 to 1375 (620to745)

21⁄4CR

A 387/A 387M

1200 to 1400 (650 to 760)

1850 (1010)

1700 (925)

250 to 1400(675 to760)

3CR

A 387/A 387M

1200 to 1400 (650 to 760)

1850 (1010)

1700 (925)

250 to1400 (675 to760)

5CR

A 387/A 387M

1200 to 1400 (650 to 760)

1850 (1010)

1650 (900)

1300 to1400 (705 to760)

9CR

A 387/A 387M

1325 to 1375 (715 to 745)

B

1325 to1375 (715 to745)

ASTM A691 Gr.91

A 387/A 387M

1350 to 1420 (730 to 770)

11900 to 2000 (1040 to 1095)

1900 min (1040 min)

1350 to 1440 (730 to 780)


Tensile Requirements of A691 Pipe

Grade

Tensile (MPa)

Yield (MPa)

Elong. (50mm)

Reduc’n of Area*

1CR

380 – 550

230 min

22% min

1-1/4CR

415 – 585

240 min

22% min

2-1/4CR, 5CR, 9CR

415 – 585

205 min

18% min

40% min

91

415 – 585

205 min

18% min

40% min


Grade Tensile (MPa) Yield (MPa) Elong. (50 mm) Reduc’n of Area*

2

485 – 620

310 min

22% min

1-1/4CR

515 – 690

310 min

22% min

1CR

450 – 585

275 min

22% min

2-1/4CR, 5CR, 9CR

515 – 690

310 min

18% min

40% min

91

585 – 760

415 min

18% min

Packing

  • Loose + groove protector + two nylon slings +  cross steel frame

    Loose + groove protector + two nylon slings + cross steel frame

  • Loose + groove protector + two nylon slings + cross steel frame

    Loose + groove protector + two nylon slings + cross steel frame

  • Loose + pipe cap + two nylon slings

    Loose + pipe cap + two nylon slings

  • Loose + two nylon slings + cross steel frame

    Loose + two nylon slings + cross steel frame

We use cookies and other tracking technologies to improve your browsing experience on our website, to show you personalized content and targeted ads, to analyze our website traffic, and to understand where our visitors are coming from,This behavior is in compliance with the user consent policy.