GB/T 28413 10 Welded Carbon Steel Tubes for Boilers and Heat Exchangers, EN 10217-1, EN 10217-2, JIS G3461, 10, 20, Q245R, Q345R, Q370R, 18MnMoNbR, 13MnNiMoR, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, 12Cr1MoVR

GB/T 28413 Welded Carbon Steel Tubes for Boilers and Heat Exchangers

Standard: GB/T 28413
Equivalent Standards: EN 10217-1, EN 10217-2, JIS G3461

Material: 10
Equivalent Materials: P195GH, STB340, 1010

Chemistry Composition

C, %	Si, %	Mn, %	P, %	S, %	Cr, %	Ni, %	Cu, %	Mo, %	V, %
0.07-0.13	0.17-0.37	0.35-0.65	0.025 max	0.015 max	0.15 max	0.25 max	0.20 max	0.15 max	0.08 max

Mechanical Properties

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %	Impact (KV2)/J
335-475	205 min	25 min	40 (OD≥76mm & WT≥14mm)

Outside Diameter & Tolerance

Hot Rolled	Outside Diameter, mm	Tolerance
	Outside Diameter, mm	Ordinary	Advanced
	OD≤54	±0.50mm	±0.30mm
	54＜OD≤325	±1%	±0.75%
	OD>325	±1%	-
Cold Drawn	Outside Diameter, mm	Tolerance
	Outside Diameter, mm	Ordinary	Advanced
	OD≤25.4	±0.15mm	-
	25.4＜OD≤40	±0.20mm	-
	40＜OD≤50	±0.25mm	-
	50＜OD≤60	±0.30mm	-
	OD>60	±0.75%	±0.50%

Wall thickness & Tolerance

Hot Rolled	Wall Thickness, mm	Tolerance
	Wall Thickness, mm	Ordinary	Advanced
	WT≤20	+15%/-10%	±10%
	WT>20	+12.5%/-10%	±10%
Cold Drawn	Wall Thickness, mm	Tolerance
	Wall Thickness, mm	Ordinary	Advanced
	WT≤3.0	±0.30mm	±0.20mm
	WT>3	±10%	±7.5%

GB/T 28413 specifies the order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of welded steel tubes for boilers and heat exchangers. GB/T 28413 is applicable to welded steel tubes for heat exchangers and medium and low pressure boilers, but not suitable for stainless steel welded steel tubes.
GB/T 28413规定了锅炉和热交换器用焊接钢管的订货内容、尺寸、外形、重量、技术要求、试验方法、检验规则、包装、标志和质量证明书。GB/T 28413适用于热交换器和中低压锅炉用焊接钢管，不适用于不锈钢焊接钢管。

Manufacture: tubes to GB/T 28413 shall be manufactured by hot rolled or cold drawn.
Heat Treatment: the tubes shall be produced by heat treated as normalizing.
Inspection & Test: chemistry composition analysis, tension test, flattening test or bending test, flaring test, hardness test (alloy & stainless), impact test, macroscopic examination, non-metallic inclusions, microstructure, intergranular corrosion test (stainless), NDT, surface inspection and dimension check.

Length: 4000mm; 6000mm; 9000mm; 12000mm; and so on.
Max developed length: 30 meters, also U bending, finning, studded process can be provided.
Option: shot blasting on the outside surface to remove mill scale, make the surface matte colour; surface polishing as preparation work done for further processing, for instance finning.

Keyword: GB T 9948, High Pressure Steel Pipe, Heat Exchanger Steel Tubes, Furnace Tubes, Piping

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