Seamless steel pipes for boilers

Process: Cold rolling and hot rolling, solution annealing
Surface: Smooth inner and outer walls without oxidation or peeling
Ra：≤1.6‑3.2μm
Material: Commonly used 20G, 15CrMoG, 12Cr1MoVG
Specification: Outer diameter 10-426mm, wall thickness 1.5-60mm customizable

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25*3 32*4 38*4.5 42*5 48*5 57*6 60*7 76*8 89*8 Custom Specs

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Product Detail

Product Overview：

Seamless steel pipes for boilers can be divided into medium and low pressure boiler pipes and high-pressure boiler pipes, which belong to a type of seamless steel pipe. There are strict requirements for the steel grades used in the manufacturing of steel pipes. Seamless steel pipes for boilers are often subjected to high temperature and high pressure conditions, and the pipes will undergo oxidation and corrosion under the action of high-temperature flue gas and water vapor. Steel pipes are required to have high durability, high resistance to oxidation and corrosion, and good structural stability. Seamless steel pipes for boilers are mainly used to manufacture superheater pipes, reheater pipes, air ducts, main steam pipes, etc. for medium and low pressure and high pressure boilers.

Product List
Product Name:	Medium and low pressure boiler tubes \| Seamless steel tubes
Product Name:	High pressure boiler tube \| seamless steel tube
Product Name:	GB3087 Seamless Steel Tubes for Low and Medium Pressure Boilers \| Seamless Tubes
Product Name:	GB5310 Seamless Steel Tubes for High Pressure Boilers
Product Name:	Seamless steel pipe for 20G high-pressure boiler \| Seamless pipe
Product Name:	Seamless steel pipe for national standard boilers

Parameter range
Outer diameter	Φ6mm‑Φ219mm
Wall thickness	0.5mm‑20mm
Standard length	1‑12m， Support customization of short and long scales
Outer diameter accuracy	Maximum ± 0.03mm
Executive Standards	ASTM A106,ASME SA335, EN 10216-2, GB/T 5310
Non-standard customization	Customization of pressure wall thickness, precision machining of inner holes, heat-resistant heat treatment, groove processing, and high temperature and anti-corrosion resistance can all be customized

Low medium pressure boiler tubes GB/T 3087-2022 \| Material: 20#
Outer diameter (mm)	25	32	38	42	48	57	60	76	89	108
Common wall thickness (mm)	2.5、3.0、4.0	3.0、3.5、4.0	3.0、3.5、4.5	3.5、4.0、5.0	3.5、4.0、5.0、6.0	3.5、4.0、5.0、6.0	4.0、5.0、6.0、7.0	4.0、5.0、6.0、8.0	4.5、5.0、6.0、8.0	4.5、5.0、6.0、8.0

High pressure boiler tube GB/T 5310-2023 \| Material: 20G, 15CrMoG, 12Cr1MoVG
Outer diameter (mm)	32	38	42	48	51	57	60	76	89	108
Common wall thickness (mm)	4.0、4.5、5.0	4.5、5.0、6.0	5.0、6.0、7.0	5.0、6.0、8.0	5.0、6.0、8.0	6.0、7.0、8.0、10.0	6.0、8.0、10、12	8.0、10.0、12.0、14.0	8.0、10.0、12.0、14.0	10.0、12.0、14.0、16.0

Optional tolerance range
Tolerance control	Optional manufacturing process
Tolerance ≤ 0.05 mm	Cold rolling
Tolerance ≤ 0.10 mm	Cold rolling
Tolerance ≤ 0.30 mm	Cold drawing \| Cold rolling
Tolerance ≤ 0.50 mm	Cold drawing \| Hot rolling
Tolerance ≤ 1.00 mm	Hot rolling \| Hot expanding

Low and medium pressure boiler tubes GB/T 3087-2022
Hot rolled pipe
Outer diameter D (mm)	Outer diameter deviation (mm)	Wall thickness deviation
≤159	± 1.0% D, minimum	±0.50+15%S /‑10%S
＞159	±1.0%D	+15%S /‑10%S
Cold drawn/cold-rolled pipes
Outer diameter D (mm)	Outer diameter deviation (mm)	Wall thickness deviation
≤30	±0.30	+12.5%S /‑10%S
30‑50	±0.30	+12.5%S /‑10%S
＞50	±1.0%D	+12.5%S /‑10%S

High pressure boiler tubes GB/T 5310-2023
Hot rolled pipe
Outer diameter D (mm)	Outer diameter deviation (mm)	Wall thickness deviation
≤159	± 1.0% D, minimum ± 0.50	+15%S /‑10%S
＞159	±1.0%D	+12.5%S /‑10%S
Cold drawn/cold-rolled pipes
Outer diameter D (mm)	Outer diameter deviation (mm)	Wall thickness deviation
≤25.4	±0.15	S≤3：±0.30；S＞3：±10%S
25.4‑40	±0.20	S≤3：±0.30；S＞3：±10%S
40‑50	±0.25	S≤3：±0.30；S＞3：±10%S
50‑60	±0.30	S≤3：±0.30；S＞3：±10%S
＞60	±0.5%D	S≤3：±0.30；S＞3：±10%S

General geometric tolerances
Project	Indicator
Ovalness	≤ 80% outer diameter tolerance
Straightness	≤1.5 mm/m
S=nominal wall thickness (mm); Advanced precision needs to be specified in the contract

Optional delivery status
Oil removal from oil pipes	Annealing and straightening	Steel pipe corrosion prevention
Steel pipe threading	Length cut-to-length	Steel pipe coating
Steel pipe cap	Exquisite bundling	Beveling

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Product Detail

Product Overview：

Product List
Product Name:	Medium and low pressure boiler tubes \| Seamless steel tubes
Product Name:	High pressure boiler tube \| seamless steel tube
Product Name:	GB3087 Seamless Steel Tubes for Low and Medium Pressure Boilers \| Seamless Tubes
Product Name:	GB5310 Seamless Steel Tubes for High Pressure Boilers
Product Name:	Seamless steel pipe for 20G high-pressure boiler \| Seamless pipe
Product Name:	Seamless steel pipe for national standard boilers

Parameter range
Outer diameter	Φ6mm‑Φ219mm
Wall thickness	0.5mm‑20mm
Standard length	1‑12m， Support customization of short and long scales
Outer diameter accuracy	Maximum ± 0.03mm
Executive Standards	ASTM A106,ASME SA335, EN 10216-2, GB/T 5310
Non-standard customization	Customization of pressure wall thickness, precision machining of inner holes, heat-resistant heat treatment, groove processing, and high temperature and anti-corrosion resistance can all be customized

Low medium pressure boiler tubes GB/T 3087-2022 \| Material: 20#
Outer diameter (mm)	25	32	38	42	48	57	60	76	89	108
Common wall thickness (mm)	2.5、3.0、4.0	3.0、3.5、4.0	3.0、3.5、4.5	3.5、4.0、5.0	3.5、4.0、5.0、6.0	3.5、4.0、5.0、6.0	4.0、5.0、6.0、7.0	4.0、5.0、6.0、8.0	4.5、5.0、6.0、8.0	4.5、5.0、6.0、8.0

High pressure boiler tube GB/T 5310-2023 \| Material: 20G, 15CrMoG, 12Cr1MoVG
Outer diameter (mm)	32	38	42	48	51	57	60	76	89	108
Common wall thickness (mm)	4.0、4.5、5.0	4.5、5.0、6.0	5.0、6.0、7.0	5.0、6.0、8.0	5.0、6.0、8.0	6.0、7.0、8.0、10.0	6.0、8.0、10、12	8.0、10.0、12.0、14.0	8.0、10.0、12.0、14.0	10.0、12.0、14.0、16.0

Optional tolerance range
Tolerance control	Optional manufacturing process
Tolerance ≤ 0.05 mm	Cold rolling
Tolerance ≤ 0.10 mm	Cold rolling
Tolerance ≤ 0.30 mm	Cold drawing \| Cold rolling
Tolerance ≤ 0.50 mm	Cold drawing \| Hot rolling
Tolerance ≤ 1.00 mm	Hot rolling \| Hot expanding

Low and medium pressure boiler tubes GB/T 3087-2022
Hot rolled pipe
Outer diameter D (mm)	Outer diameter deviation (mm)	Wall thickness deviation
≤159	± 1.0% D, minimum	±0.50+15%S /‑10%S
＞159	±1.0%D	+15%S /‑10%S
Cold drawn/cold-rolled pipes
Outer diameter D (mm)	Outer diameter deviation (mm)	Wall thickness deviation
≤30	±0.30	+12.5%S /‑10%S
30‑50	±0.30	+12.5%S /‑10%S
＞50	±1.0%D	+12.5%S /‑10%S

High pressure boiler tubes GB/T 5310-2023
Hot rolled pipe
Outer diameter D (mm)	Outer diameter deviation (mm)	Wall thickness deviation
≤159	± 1.0% D, minimum ± 0.50	+15%S /‑10%S
＞159	±1.0%D	+12.5%S /‑10%S
Cold drawn/cold-rolled pipes
Outer diameter D (mm)	Outer diameter deviation (mm)	Wall thickness deviation
≤25.4	±0.15	S≤3：±0.30；S＞3：±10%S
25.4‑40	±0.20	S≤3：±0.30；S＞3：±10%S
40‑50	±0.25	S≤3：±0.30；S＞3：±10%S
50‑60	±0.30	S≤3：±0.30；S＞3：±10%S
＞60	±0.5%D	S≤3：±0.30；S＞3：±10%S

General geometric tolerances
Project	Indicator
Ovalness	≤ 80% outer diameter tolerance
Straightness	≤1.5 mm/m
S=nominal wall thickness (mm); Advanced precision needs to be specified in the contract

Optional delivery status
Oil removal from oil pipes	Annealing and straightening	Steel pipe corrosion prevention
Steel pipe threading	Length cut-to-length	Steel pipe coating
Steel pipe cap	Exquisite bundling	Beveling