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TORICH GB/T13793 10#15#20# Q195 215A 235A Welded Steel Tube Smooth Roughness

Categories	Welded Steel Tube
Brand Name:	torich
Model Number:	GB/T13793
Certification:	ISO9001:2008,ISO14001:2008,TS16949,CE PED,TUV,APIABS,BV
Place of Origin:	China
MOQ:	5 Ton
Price:	500-1200 USD/ton
Payment Terms:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability:	20000 T/Year
Delivery Time:	35 Days
Packaging Details:	packing in wooden boxes or in hexagonal bundles
Name:	GB/T13793 10#15# Steel Pipes with a longitudinal Electric Resistance Weld
Technique:	HFRW
Surface:	oiled
Delivery condition:	heat treatment
Usage:	Construction Structure,Liquid Transportation
Length:	4-12m
OD:	5-711mm
WT:	0.5-50mm

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TORICH GB/T13793 10#15#20# Q195 215A 235A Welded Steel Tube Smooth Roughness

Product Name:TORICH GB/T13793 Material 10#15#20# Q195 215A 235A Steel Pipes with a longitudinal Electric Resistance Weld

Standard:GB/T13793

Size Range: OD: 5-711mm WT: 0.5-50mm Length: 4-12mm or according to customers' actual application and production.

Application:Construction Structure,Liquid Transportation

Steel Grade:10# 15# 20# Q195/Q235/Q345/Q390/Q420

Technology:HFRW

Characteristic:

Good concentricity

Good surface quality

Good OD and ID tolerance

High Precision

Stable quality

Smooth Roughness

TORICH QUALITY ASSURANCE

Table 1 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

Table 2 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.

Table 3 The Bending of Steel tube

Outer Diameter(D)/mm	Bending/(mm/m),No more than
Outer Diameter(D)/mm	General Precesion(PD.A)	Higher Precision(PD.B)	High Precision(PD.C)
＞16	1.5	1.0	0.5

Table 4 The Height of Inner Burr Unit:mm

General Precesion

Higher Precision

High Precision

+0.50

-0.20

+0.50

-0.05

+0.20

-0.05

Table 5 Weight coefficient of galvanized steel pipe

Wall thickness t/mm		1.2	.14	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

Table 6 Mechnical Properties

Steel Grade	Lower yield strength R_e1./MPa	Tensile strength R_m/MPa	Elongation A/％
			D≤168.3mm	D＞168.3mm
	≥
08,10	195	315	22
15	215	355	20
20	235	390	19
Q195^b	195	315	15	20
Q215A,Q215B	215	335
Q235A,Q235B,Q235C	235	370
Q275A,Q275B,Q275C	275	410	13	18
Q345A,Q345B,Q345C	345	470
Q390A,Q390B,Q390C	390	490	19
Q420A,Q420B,Q420C	420	520	19
Q460C,Q460D	460	550	17

Table 7 Weight of hot dip galvanized layer

Weight grade of galvanized layer	Requirement	The total weight of zinc coating per unit area of the inner and outer surfaces /(g/㎡) no less than
A	Inside and outside surface	500
B	Inside and outside surface	400
C	Inside and outside surface	300

Table 8 Test items and sampling for steel tubes

Number	Test items	Test frequency	Sampling quantity
1	Smelting analysis	1/furnace	1
2	Finished product analysis	1/furnace	1
3	Tensile test	1/batch	1
4	Weld tensile test	1/batch	1
5	Impact test	1/batch	2 groups in a time, 3 samples in a group
6	Flattening test	1/batch	1 sample on 2 pipes in each batch
7	Bending test	1/batch	1 sample on 2 pipes in each batch
8	Flaring test	1/batch	1 sample on 2 pipes in each batch
9	Hydraulic test	All	All
10	Ultrasonic testing	All	All
11	Eddy current testing	All	All
12	Galvanized layer uniformity test	1/batch	1/batch
13	Galvanized weight determination	1/batch	1/batch
14	Galvanized layer adhesion test	1/batch	1/batch

Product Tags:

welded steel pipe

welding steel tubing

TORICH GB/T13793 10#15#20# Q195 215A 235A Welded Steel Tube Smooth Roughness

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