Standard

ASME SA333/SA333M

Seamless and Welded Steel Pipe for Low-Temperature Service.


This specification covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. The pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation. All seamless and welded pipes shall be treated to control their microstructure. Tensile tests, impact tests, hydrostatic tests, and nondestructive electric tests shall be made in accordance to specified requirements.


Size (mm):

Outer Dimensions: 19.05mm ~ 114.3mm

Wall Thickness:2.0mm ~ 14 mm

Length: max 16000mm


Inspection and Test:

Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.


Surface treatment:

Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting. Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.


Chemical Composition:

Grade

Chemical Composition (%)

C

Si

Mn

P

S

Cr

Ni

Cu

Mo

V

Al

Grade 1

≤0.30


0.40-1.06

≤0.025

≤0.025







Grade 3

≤0.19

0.18-0.37

0.31-0.64

≤0.025

≤0.025


3.18-3.82





Grade 4

≤0.12

0.18-0.37

0.50-1.05

≤0.025

≤0.025

0.44-1.01

0.47-0.98

0.40-0.75



0.04-0.30

Grade 6

≤0.30

≥0.10

0.29-1.06

≤0.025

≤0.025







Grade 7

≤0.19

0.13-0.32

≤0.90

≤0.025

≤0.025


2.03-2.57





Grade 8

≤0.13

0.13-0.32

≤0.90

≤0.025

≤0.025


8.40-9.60





Grade 9

≤0.20


0.40-1.06

≤0.025

≤0.025


1.60-2.24

0.75-1.25




Grade 10

≤0.20

0.10-0.35

1.15-1.50

≤0.03

≤0.015

≤0.15

≤0.25

≤0.015

≤0.50

≤0.12

≤0.06

Grade 11

≤0.10

≤0.35

≤0.6

≤0.025

≤0.025

≤0.50

35.0-37.0


≤0.50




Mechanical Requirments:

Grade

Tensile Strength (MPa)

Yield Point (MPa)

Elongation (%)

Y

X

Grade 1

≥380

≥205

≥35

≥25

Grade 3

≥450

≥240

≥30

≥20

Grade 4

≥415

≥240

≥30

≥16.5

Grade 6

≥415

≥240

≥30

≥16.5

Grade 7

≥450

≥240

≥30

≥22

Grade 8

≥690

≥515

≥22


Grade 9

≥435

≥315

≥28


Grade 10

≥550

≥450

≥22


Grade 11

≥450

≥240

≥18



Strike Temperature Condition:

Crade

The lowest temperature for strike test

ASME SA333/SA333M Grade 1

-50

-45

ASME SA333/SA333M Grade 3

-150

-100

ASME SA333/SA333M Grade 4

-150

-100

ASME SA333/SA333M Grade 6

-50

-45

ASME SA333/SA333M Grade 7

-100

-75

ASME SA333/SA333M Grade 8

-320

-195

ASME SA333/SA333M Grade 9

-100

-75

ASME SA333/SA333M Grade 10

-75

-60

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