COMMONLY USED ASME SA 671, SA672 & SA 691 GRADE PIPES

ASME SA 671, SA672 & SA691 PIPE GRADE , CLASS & PLATE DESIGNATIONS

Pipe Designation Example : SA 671 Gr CC 70 Cl 12 , SA 672 Gr C 70 Cl 12 & SA 691 Gr 2 ¼ Cl 22

ASME Pipe Designation

Grade Designations

Class Designations

PIPE & PLATE SPECIFICATION

CLASS DESIGNATION

SA 671

Class

Heat Treatment of pipe

Radio

graphy

Pressure

ELECTRIC-FUSION-WELDED STEEL PIPE FOR ATMOSPHERIC AND LOWER TEMPERATURES

Pipe Grade

Type of steel

ASTM Spec

10

None

N.A

N.A

No.

Grade

11

None

YES

N.A

CA55

Plain Carbon

A 285

C

12

None

YES

YES

CB 60

Plain Carbon, Killed

A 515

60

13

None

N.A

YES

CB 65

Plain Carbon, Killed

A 515

65

20

Stress Relived

N.A

N.A

CB 70

Plain Carbon, Killed

A 515

70

21

Stress Relived

YES

N.A

CC 60

Plain Carbon, Killed, Fine Grain

A 516

60

22

Stress Relived

YES

YES

CC 65

Plain Carbon, Killed, Fine Grain

A 516

65

23

Stress Relived

N.A

YES

CC 70

Plain Carbon, Killed, Fine Grain

A 516

70

30

Normalized

N.A

N.A

SA 672

31

Normalized

YES

N.A

YES

N.A

ELECTRIC-FUSION-WELDED STEEL PIPE FORHIGH-PRESSURE SERVICE AT MODERATE TEMPERATURES

32

Normalized

YES

YES

YES

YES

33

Normalized

N.A

YES

N.A

YES

A 45

Plain Carbon

A 285

A

40

Normalized and Tempered

N.A

N.A

A 50

Plain Carbon

A 285

B

41

Normalized and Tempered

YES

N.A

A 55

Plain Carbon

A 285

C

42

Normalized and Tempered

YES

YES

B 55

Plain Carbon, Killed

A 515

55

43

Normalized and Tempered

N.A

YES

B 60

Plain Carbon, Killed

A 515

60

50

Quenched and Tempered

N.A

N.A

B 65

Plain Carbon, Killed

A 515

65

51

Quenched and Tempered

YES

N.A

B 70

Plain Carbon, Killed

A 515

70

52

Quenched and Tempered

YES

YES

C 55

Plain Carbon, Killed, Fine Grain

A 516

55

53

Quenched and Tempered

N.A

YES

C 60

Plain Carbon, Killed, Fine Grain

A 516

60

Note :1. Radiography as per Section VIII , Para UW-51

2. Pressure test as per A 530 section 6.

3 Yes- Applicable

4 N.A.- Not applicable

C 65

Plain Carbon, Killed, Fine Grain

A 516

65

C 70

Plain Carbon, Killed, Fine Grain

A 516

70

SA 691

CARBON AND ALLOY STEEL PIPE, ELECTRIC-FUSION-WELDED FOR HIGH-PRESSURE SERVICE AT HIGH TEMPERATURES

HB, MAX

½ CR

½ %Chromium, ½ % molybdenum steel

A 387

2

201

1 CR

1 % Chromium, ½ % molybdenum steel

A 387

12

201

1¼CR

1¼% Chromium,½ %molybdenum steel

A 387

11

201

2¼CR

2¼ % Chromium,1 % molybdenum steel

A 387

22

201

3 CR

3 % Chromium, 1 % molybdenum steel

A 387

21

201

5 CR

5 % Chromium, ½ %molybdenum steel

A 387

5

225

9 CR

9 % Chromium, 1 % molybdenum steel

A 387

9

241