ERW pipe

ERW PIPE
Electrical resistance welding
OD21.3MM-114MM 273MM 219MM 325MM
WT 0.75-8MM
STD Q195-Q235 st33 /st37 LIFE: >5years
ERW pipe
OD20MM-114MM 273MM 219MM 325mm
WT 0.75MM-8MM

standard Q195-Q235 ST33 ST42 ST37
life more than 5years
usage:furniture making ,tv stand,scaffolding,bedsteads,etc.
chemical composition-Q235
:
Q235 made by grade A\B\C\D(GB700-88)
Q235A C0.14~0.22% Mn0.30~0.65 Si≤0.30 S≤0.050 P≤0.045
Q235B C0.12~0.20% Mn0.30~0.670 Si≤0.30 S≤0.045 P≤0.045
Q235C C≤0.18% Mn0.35~0.80 Si≤0.30 S≤0.040 P≤0.040
Q235D C≤0.17% Mn0.35~0.80 Si≤0.35 S≤0.040 P≤0.035
mechanical behavior-Q235:
tensile strength: σb/MPa 375-500
tensil stretch(δ5/%):
>26 (a<16mm), >25 (a>16-40mm)
>24 (a>40-60mm), >23 (a>60-100mm)
>22 (a>100-150mm), >21 (a>150mm)
a=wt or diameter

About BS 1387-1985
BS 1387:1985 has been withdrawn and replaced with the EN 10255:2004 (implemented by UK national standard body as BS EN 10255:2004 "Non-alloy steel tubes suitable for welding or threading"). The table below gives the corresponding types in BS 1387 and EN 10255.
EN 10255 L

EN 10255 L1

EN 10255 L2
BS 1387 Light
EN 10255 Medium
BS 1387 Medium
EN 10255 Heavy
BS 1387 Heavy

Dimensions and weight of steel tubes according the British Standard - BS 1387:1985 "Specification for screwed and socketed steel tubes and tubulars and for plain end steel tubes suitable for welding or for screwing to BS 21 pipe threads" can be found in the table below:
Nominal bore
Outside diameter
Thickness
Mass
Light
Medium/
Heavy
Light
Medium
Heavy
Light
Medium
Heavy
in
mm
mm
mm
mm
mm
mm
kg/m
kg/m
kg/m
1/4
8
13.60
13.90
1.80
2.30
2.90
0.515
0.641
0.765
3/8
10
17.10
17.40
1.80
2.30
2.90
0.670
0.839
1.020
1/2
15
21.40
21.70
2.00
2.60
3.20
0.947
1.210
1.440
3/4
20
26.90
27.20
2.30
2.60
3.20
1.380
1.560
1.870
1
25
33.80
34.20
2.60
3.20
4.00
1.980
2.410
2.940
1 1/4
32
42.50
42.90
2.60
3.20
4.00
2.540
3.100
3.800
1 1/2
40
48.40
48.80
2.90
3.20
4.00
3.230
3.570
4.380
2
50
60.20
60.80
2.90
3.60
4.50
4.080
5.030
6.190
2 1/2
65
76.00
76.60
3.20
3.60
4.50
5.710
6.430
7.930
3
80
88.70
89.50
3.20
4.00
5.00
6.720
8.370
10.300
4
100
113.90
114.90
3.60
4.50
5.40
9.750
12.200
14.500
5
125

140.60

5.00
5.40

16.600
17.900
6
150

166.10

5.00
5.40

19.700
21.300
The standard is applicable to tubes of nominal size DN8 to DN150 in light, medium and heavy thickness