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Boiler Tube

1. Type: boiler seamless steel pipe, A192 boiler pipe······

2. Application: Superheated pipeline, Steam pipeline, Boiling water tube, etc

3. OD: 13.72-914.4mm, WT: 1.65-40mm, L: 0.5-20mt

4. Standard & Grade: ASTM A179, ASTM A192, ASTM A210, EN 10216-2, JIS 3461, DIN 17175

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What is boiler tube

The boiler tube is a branch pipe of the seamless steel pipe. It is used for boiler, heat-exchanger, or superheater. It has stringent requirements for the manufacture of steel pipes. According to the working temperature. It can be divided into general boiler tubes and high-pressure boiler tubes. Some of the boiler pipes are made of carbon steel and alloy steel. Both carbon steel boiler tubes and alloy steel boiler tubes have different usage situations and temperature situations.

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Outer Diameter Tolerances
Standard	Outer Diameter	Tolerance
GB3087	≤180	±1.0% (min: ±0.5mm)
GB5310	≤50	±0.5mm
GB5310	>50	±1.0%

Wall Thickness Tolerances
Standard	Wall Thickness(mm)	Tolerance
GB3087	3-20	+15%,12.5%
GB3087	>20	±12.5%
GB5310	<3.5	+15%,-10%
	3.5-20	+15%,-10%
	>20	±10%

Chemical composition and mechanical properties
Standard	Grade	Chemical composition(%)					Mechanical properties
Standard	Grade	C	Si	Mn	P	S	Tensile Strength (Mpa)	Yield Strength (Mpa)	Elongation (%)
DIN17175	St35.8	≤0.17	0.10-0.35	0.40-0.80	≤0.030	≤0.030	360-480	≥235	≥25
DIN17175	St45.8	≤0.21	0.10-0.35	0.40-1.20	≤0.030	≤0.030	410-530	≥255	≥21

Outer Diameter Tolerances
Standard	Outer Diameter	Tolerance
GB3087	≤180	±1.0% (min: ±0.5mm)
GB5310	≤50	±0.5mm
GB5310	>50	±1.0%

Wall Thickness Tolerances
Standard	Wall Thickness(mm)	Tolerance
GB3087	3-20	+15%,12.5%
GB3087	>20	±12.5%
GB5310	<3.5	+15%,-10%
	3.5-20	+15%,-10%
	>20	±10%

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