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GB/T 37577

GB/T 37577 steel pipe is a large diameter welded pipe for cryogenic pipelines, which can be bent, crimped and similarly shaped, and is also suitable for welding operations.

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GB/T 37577

GB/T 37577 steel pipe is a large diameter welded pipe for cryogenic pipelines, which can be bent, crimped and similarly shaped, and is also suitable for welding operations.

Email:

WhatsApp:

Still deciding? Get samples first, Contact US !

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GB/T 37577

Description

Product Description

GB/T 37577 steel pipe is a large diameter welded pipe for cryogenic pipelines, which can be bent, crimped and similarly shaped, and is also suitable for welding operations. Steel pipe carbon steel material grade (chemical composition) for 16MnDR, using high-frequency welding or electrofusion welding process. The alloy steel material grade (chemical composition) of the pipe is 15MnNiDR, 15MnNiNbDR, 09MnNiDR, 08Ni3DR and 06Ni9DR, and it is manufactured by high-frequency welding or electrofusion welding process.

Product Size

Outer diameter: 114.3～610.0mm
Wall thickness: 3.50～40.00mm
End: flat end, beveling for selection
Length: 3-12 meters or SRL, DRL, double and fixed feet.

Packaging

Outer surface with clear/black paint, bundled with steel straps.

Chemical composition

	C	Mn	P	S	Si	Cr	Cu	Mo	Ni	V
	≤，%		≤，%		≤，%
16MnDR	0.20	1.20～1.60	0.020	0.010	0.15～0.50	0.25	0.25	0.08	0.40

Grades

15MnNiDR

≤0.18

1.20～1.60

0.020

0.008

0.15～0.50

0.25

一

0.20～0.60

≤0.05

≥0.020

15MnNiNbDR

≤0.18

1.20～1.60

0.020

0.008

0.15～0.50

0.25

0.015～0.040

0.30～0.70

09MnNiDR

≤0.12

1.20～1.60

0.020

0.008

0.15～0.50

0.25

一

≤0.040

0.30～0.80

一

≥0.020

08Ni3DR

≤0.10

0.30～0.80

0.015

0.005

0.15～0.35

0.25

≤0.12

一

3.25～3.70

≤0.05

一

06Ni9DR

≤0.08

0.30～0.80

0.008

0.004

0.15～0.35

0.25

≤0.10

一

8,50～10.00

≤0,01

Product Mechanical Properties

	Tensile strength ≥, MPa			Yield strength ≥, MPa			Elongation after break ≥, %	Parent material, weld -40 ℃ when the impact absorption work (average) ≥, J
	thickness≤16mm	16＜thickness≤36mm	36＜thickness≤75mm	thickness≤16mm	16＜thickness≤36mm	36＜thickness≤75mm
16MnDR	490～620	470～600	460～590	315	295	285	21	24

	Tensile strength ≥, MPa			Yield strength ≥, MPa			Elongation after break ≥, %	Parent material, weld impact absorption work J
	thickness≤16mm	16＜thickness≤36mm	36＜thickness≤75mm	thickness≤16mm	16＜thickness≤36mm	36＜thickness≤75mm		Parent material, weld impact absorption work J
	thickness≤16mm	16＜thickness≤36mm	36＜thickness≤75mm	thickness≤16mm	16＜thickness≤36mm	36＜thickness≤75mm		Test temperature ℃	Average value
15MnNiDR	490～620	480～610	470～600	≥325	≥315	≥305	≥20	-40	≥30
5MnNiNbDR	530～630	530～630	520～620	≥370	≥360	≥350	≥20		≥30
09MnNiDR	440～570	430～560	430～560	≥300	≥280	≥270	≥23		≥30
08Ni3DR	490～620	490～620	490～620	≥320	≥320	≥320	≥21		≥30
06Ni9DR	680～820	680～820	680~820	≥560			≥18		≥50