High Pressure Boiler Tube Manufacturer

High Pressure Boiler Tube

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Standard:
China National Standards GB3087.GB5310
American Society of Mechanical Engineers
ASME SA-106.ASME SA-192M.ASME SA-209M.ASME SA-210M.
ASME SA-213M.ASME SA-335M
Deutsche Industrial Normen
DIN17175
Japanese Industrial Standard
JIS G 3461

Application:
Manufacturing water wall panels, economizers, reheaters, superheaters and pipeline of boilers

Dimension Tolerances:
Pipe wall and OD tolerances as per GB5310

Pipe category	Pipe sizes(mm)			tolerances
				Standard	Higher
Hot rolled	OD	≤159		±1.0%(min±0.5mm)	±0.75%(min±0.3mm)
		>159		±1.0%	±0.90%
	WT	<3.5		15%(min 0.48mm -10% -0.32mm)	±10%(min±0.2mm)
		3.5~2.0		15% -10%	±10%
		>20	D<219	±10%	±7.5%
			D<219	12.5% -10.0%	±10%
Cold drawn	OD	≤30		±0.20mm	±0.15mm
		>30~50		±0.30mm	±0.25mm
		>50		±0.8%	±0.6%
	WT	2~3		12% -10%	±10%
		>3		±10%	±7.5%

Pipe wall and OD tolerances as per GB3087

Pipe category	Pipe sizes(mm)		tolerances
Pipe category	Pipe sizes(mm)		Standard	Higher
Hot rolled	OD	≤159	±1.0%(min±0.5mm)	±0.75%(min±0.4mm)
	OD	>159	±1.0%	±0.90%
	WT	≤20	15%(min 0.45mm -12.5% -0.35mm)	±10%(min±0.3mm)
	WT	>20	±12.5%	±10%
Cold drawn	OD	10~30	±0.40mm	±0.20mm
		>30~50	±0.45mm	±0.25mm
		>50	1.0%	±0.75%
	WT	1.5~3.0	15% -10%	±10%
	WT	>3.0	±12.5% -10%	±10%

Seamless Steel Tube for High Pressure Boiler
Manufacturing Specification of Seamless Steel Tube for High Pressure Boiler

No.	Grade	Specification			Executive Standard
No.	Grade	Outer Diameter /mm	Wall Thickness /mm	Economical Length /m	Executive Standard
1	20G , 20MnG , 25MnG , 15MoG , 20MoG	10 ~ 127	1 ~ 20	6 ~ 12.0	GB 5310
		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
2	12CrMoG , 15CrMoG , 12Cr2MoG 12Cr1MoVG , 30Cr1MoVG , 12Cr2MoWVTiB , 15NiMnMoNbCu 10Cr9Mo1VNbN	10 ~ 127	1 ~ 20	6 ~ 12.0	GB 5310
		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