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Electric Resistance Welde Longitudinal Electric Resistance Welded Hot Dip Galvanized Steel Tubes

GB/T 13793 Longitudinal Electric Resistance Welde Longitudinal Electric Resistance Welded Hot Dip Galvanized Steel Tubes

Application:Suitable for mechanical, construction and other structural purposes, and the straight seam welded steel pipe with an outer diameter of not more than 711mm, can also be applied to general welded steel pipe for fluid transportation

size:L--4~12m OD--5~711mm WT--0.5~5.5mm

Grade:10,20,Q195,Q215,Q213,Q275

Manufacture method:The steel pipe shall be made of hot rolled steel strip or cold rolled steel strip by high frequency resistance welding method

Delivery State:Steel tube should be welding or heat treatment state delivery

Surface Quality:The internal and external surfaces of the steel tube are not allowed to have cracks, scabs, folds, delaminations, laps, and burns. Allows for scribes, scratches, misalignment of welds, burns, oxide scales, and external burr removal traces that are not more than a negative wall thickness deviation

Tolerance of Outer Diameter Unit:mm

Outer Diameter(D)	General Precesion(PD.A)^a	Higher Precision(PD.B)	High Precision(PD.C)
5-20	±0.30	±0.15	±0.05
﹥20-35	±0.40	±0.20	±0.10
＞35-50	±0.50	±0.25	±0.15
＞50-80	±1%D	±0.35	±0.25
＞80-114.3		±0.60	±0.40
＞114.3-168.3		±0.70	±0.50
＞168.3-219.1		±0.80	±0.60
＞219.1-711		±0.75%D	±0.5%D
^a Not apply for steel pipe for roller of belt conveyor

Tolerance of Wall Thickness Unit:mm

Wall Thickness(t)	General Precesion(PD.A)^a	Higher Precision(PD.B)	High Precision(PD.C)	Non-uniform Wall Thickness^b
0.50-0.70	±0.10	±0.04	±0.03	≤7.5%t
＞0.70-1.0		±0.05	±0.04
＞1.0-1.5		±0.06	±0.05
＞1.5-2.5	±10%t	±0.12	±0.06
＞2.5-3.5		±0.16	±0.10
＞3.5-4.5		±0.22	±0.18
＞4.5-5.5		±0.26	±0.21
＞5.5		±7.5%t	±5.0%t
^a Not apply for steel pipe for roller of belt conveyor ^b Not apply for General Precesion steel tube. Non-uniform Wall Thickness means the difference between maximum and minimum values of measured wall thickness on the same cross section.

Weight coefficient of galvanized steel pipe

Wall thickness t/mm		1.2	1.4	1.5	1.6	1.8	2.0	2.2	2.5	2.8	3.0	3.2	3.5
Coefficient c	A	1.106	1.091	1.085	1.080	1.071	1.064	1.058	1.051	1.045	1.042	1.040	1.036
Coefficient c	B	1.085	1.073	1.068	1.064	1.057	1.051	1.046	1.041	1.036	1.034	1.032	1.029
Coefficient c	C	1.064	1.055	1.051	1.048	1.042	1.038	1.035	1.031	1.027	1.025	1.022	1.020
Wall thickness t/mm		3.8	4.0	4.2	4.5	4.8	5.0	5.4	5.6	6.0	6.5	7.0	8.0
Coefficient c	A	1.034	1.032	1.030	1.028	1.027	1.025	1.024	1.023	1.021	1.020	1.018	1.016
Coefficient c	B	1.027	1.025	1.024	1.023	1.021	1.020	1.019	1.018	1.017	1.016	1.015	1.013
Coefficient c	C	1.020	1.019	1.018	1.017	1.016	1.015	1.014	1.014	1.013	1.012	1.011	1.010
Wall thickness t/mm		9.0	10.0	11.0	12.0	12.7	13.0	14.2	16.0	17.5	20.0
Coefficient c	A	1.014	1.013	1.012	1.011	1.010	1.010	1.009	1.008	1.007	1.006
Coefficient c	B	1.011	1.010	1.009	1.008	1.008	1.008	1.007	1.006	1.006	1.005
Coefficient c	C	1.008	1.008	1.007	1.006	1.006	1.006	1.005	1.005	1.004	1.004

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Categories	Welded Steel Tube
Brand Name:	TORICH
Model Number:	GB/T 13793
Certification:	ISO 9001 ISO 14001 TS 16949 EN 10204.3.1 LR KR
Place of Origin:	CHINA
MOQ:	0.5 Ton
Price:	USD 500~1000 per ton
Payment Terms:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability:	60000 Tons per year
Delivery Time:	35-45 days
Packaging Details:	In bundles in wooden box
Product name:	Longitudinal Electric Resistance Welded Hot Dip Galvanized Steel Tubes
Keyword:	Longitudinal Electric Resistance Welded Hot Dip Galvanized Steel Tubes
Type:	Welded ERW
Surface:	Galvanized Coated
Material:	Q195/Q235/Q345
Usage:	Construction Structure
Shape:	Round Shape
Length:	4-12m
OD:	5-711mm
WT:	0.5-5.5mm