Low Temperature Pipe

ASTM A333 (ASME S/A-333) Pipe grades permit low temperature service. This specification covers nominal (average) walled pipe almost exclusively in seamless.

Several grades of ferritic steel are included. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse effect on low-temperature impact properties.

• Seamless steel tubes for low-temperature service
• A333-6 low temperature steel pipe welding
• GB/T18984 Low-temperature heat exchanger tubes
• Welding method of low carbon steel at a low temperature
• Low and medium pressure boiler pipe

Main ASTM A333 alloy pipes/tubes

ASTM A333 (ASME S/A-333) Pipe grades permit low temperature service.

ASTM A333 Gr.1 pipe

ASTM A333 Grade 1 alloy pipe shall be made by the seamless or welding process...

A333 Gr.6 seamless pipe 

ASTM A333 Grade 6 covers seamless and welded steel pipe for low temperature service.

Gr.8 Ultra-low temperature pipe

ASTM A333 Gr. 8 specification covers seamless steel pipe for Ultra-low temperature service.

ASTM A333 Grade 3 Pipe

ASMT A333 Grade 3 seamless and welded pipes shall be treated to control their microstructure.

ASTM A333 Grade 9

ASMT A333 Grade 9 seamless and welded pipes shall be treated to control their microstructure.

ASTM A333 Grade 7 Pipe

ASMT A333 Grade 7 seamless and welded pipes shall be treated to control their microstructure.

A333 pipe is furnished to nine different grades designated by numbers 1, 3, 4, 6, 7, 8, 9, 10, & 11. Discussed herein are Grades 1 and 6.

Sunny Steel Supply supplies a full range of ASTM A333 (ASME S/A 333)

Grades: ASTM A333 Grade 1 and Grade 6

Sizes 

• 1/4” Nominal to 24”O.D.
• Wall Thickness – Schedule 10 through XXH
• Unscheduled heavy wall pipe thicknesses available up to 4 inches. 

Strike temperature condition：

Crade	The lowest temperature for strike test
	℉	℃
ASTM A333 Grade 1	-50	-45
ASTM A333 Grade 6	-50	-45

 Mechanical requiremnts of ASTM A333 alloy pipe

Grade	Tensile Strength (MPa）	Yield Point (MPa)	Elongation (%)
			Y	X
Grade 1	≥380	≥205	≥35	≥25
Grade 6	≥415	≥240	≥30	≥16.5

 Chemical Composition (%) of ASTM A333 steel pipe

Grade	Chemical Composition (%)
	C	Si	Mn	P	S
Grade 1	≤0.30		0.40-1.06	≤0.025	≤0.025
Grade 6	≤0.30	≥0.10	0.29-1.06	≤0.025	≤0.025

Heat Treatment:

Grades 1 and 6 shall be heat treated to control their microstructure. 
ASTM A333 Grade 6 and ASME SA 333 Grade 6 are heat treated to achieve normalized condition @ 920 degrees Celsius with controlled microstructure.

Specific Impact requirements

The raw material used for low temperature service pipe is ALUMINIUM killed with high proportion of manganese (more than 1%) combined with low proportions of carbon (less than 0.23%).For low temperature pipe to be certified as LTCS additional impact test should be conducted at low temperatures, as per mandatory requirements in section 8 of ASTM A 333.

Production specification range of low temperature pipe products

No.	Order No.	Size description			Standard
		O.D. /mm	W.T. /mm	Legnth /m
1	A333 Gr.6 A333 Gr.6/X42NS	10～127	1～20	6～12.0	ASTM A333 Pipe grades permit low temperature service.
		42～114.3	3.5～6	6～12.2
		42～114.3	6～12	6～12.2
		114.3～180	3.8～8	6～12.2
		114.3～180	8～22	6～12.2
		68～180	10～14	6～12.2
		69～254	14～55	6～12.2
		140～340	6～8	6～12.2
		140～368	8～42	6～12.2
		318～720	14～50	4～12.5
2	A333 Gr.6/X52QS	42～114.3	3.5～12	6～12.2
		114.3～180	3.8～22	6～12.2
		68～254	10～40	6～12.2
		140～368	6～40	6～12.2
		318～720	14～40	4～12.5
		140～368	6～25	6～12.2
		318～720	14～25	4～12.5
3	16MnDG	10～127	1～20	6～12.0	GB/T 18984
		42～114.3	3.5～12	6～12.2
		114.3～180	3.8～22	6～12.2
		68～254	10～55	6～12.2
		140～368	6～42	6～12.2
		318～720	14～120	4～12.5

For low temperature

Production specification range of low temperature pipe products