Electric Resistance Welding Pipe(ERW steel pipe) is hot-rolled coil after forming machine, the use of high-frequency current skin effect and proximity effects, the tube edge heating and melting, squeeze roller under pressure welding to achieve production.
There are significant differences in the welding methods between high frequency welded pipe and submerged arc welded pipe. As the welding is done instantly at high speed, the difficulty of ensuring the quality of welding is much higher than that of submerged arc welding.
Uses:For conveying gas, water and oil either in the oil or natural gas industries.
OD |
21.3mm -660mm |
W.T |
1mm-20mm |
LENGTH |
0.5mtr-22mtr |
Surface |
Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer’s requirement |
Standard |
API5L, ASTM A53 GR.B, ASTM A178, ASTM A500/501, ASTM A691, ASTM A252, ASTM A672, EN 10217; API SPEC 5L ISO 3183 GB/T 9711.1 GB/T 9711.2 GB/T 9711.3 |
Ends |
Square Ends (straight cut, saw cut) Beveled Ends |
Tolerance of Outside Diameter |
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Standard |
Out Diameter |
Tolerance of Pipe End |
Tolerance of Pipe Body |
API 5L |
219.1~273.1 |
+1.6mm, -0.4mm |
±0.75% |
274.0~320 |
+2.4mm, -0.8mm |
±0.75% |
|
323.8~457 |
+2.4mm, -0.8mm |
±0.75% |
|
508 |
+2.4mm, -0.8mm |
±0.75% |
|
559~610 |
+2.4mm, -0.8mm |
±0.75% |
Tolerance of Wall Thickness |
|||
Standard |
Grade |
Out Diameter |
Wall Thickness |
API 5L |
A |
219.1~457 |
+15%, -12.5% |
B |
508~610 |
+17.5%, -12.5% |
|
X42-X80 |
508~610 |
+19.5%, -8% |
Chemical Analysis (%) |
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Standard |
Class |
Grade |
C |
Si |
Mn |
P |
S |
V |
Nb |
Ti |
max |
max |
max |
max |
max |
max |
max |
max |
|||
API SPEC 5L |
PLS1 |
L245 B |
0.26 |
- |
1.2 |
- |
0.03 |
0.03 |
- |
- |
L290 X42 |
0.26 |
- |
1.3 |
- |
0.03 |
0.03 |
- |
- |
||
L320 X46 |
0.26 |
- |
1.4 |
- |
0.03 |
0.03 |
- |
- |
||
L360 X52 |
0.26 |
- |
1.4 |
- |
0.03 |
0.03 |
- |
- |
||
L390 X56 |
0.26 |
- |
1.4 |
- |
0.03 |
0.03 |
- |
- |
||
L415 X60 |
0.26 |
- |
1.4 |
- |
0.03 |
0.03 |
- |
- |
||
L450 X65 |
0.26 |
- |
1.45 |
- |
0.03 |
0.03 |
- |
- |
||
L485 X70 |
0.26 |
- |
1.65 |
- |
0.03 |
0.03 |
- |
- |
||
PLS2 |
L245M BM |
0.22 |
0.45 |
1.2 |
0.025 |
0.015 |
0.05 |
0.05 |
0.04 |
|
L290M X42M |
0.22 |
0.45 |
1.3 |
0.025 |
0.015 |
0.05 |
0.05 |
0.04 |
||
L320M X46M |
0.22 |
0.45 |
1.3 |
0.025 |
0.015 |
0.05 |
0.05 |
0.04 |
||
L360M X52M |
0.22 |
0.45 |
1.4 |
0.025 |
0.015 |
- |
- |
- |
||
L390M X56M |
0.22 |
0.45 |
1.4 |
0.025 |
0.015 |
- |
- |
- |
||
L415M X60M |
0.12 |
0.45 |
1.6 |
0.025 |
0.015 |
- |
- |
- |
||
L450M X65M |
0.12 |
0.45 |
1.6 |
0.025 |
0.015 |
- |
- |
- |
||
L485M X70M |
0.12 |
0.45 |
1.7 |
0.025 |
0.015 |
- |
- |
- |
||
L555M X80M |
0.12 |
0.45 |
1.85 |
0.025 |
0.015 |
- |
- |
- |
Mechanical Properties |
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Standard |
Class |
Grade |
|
Yield strength not less than (MPa) |
Tensile strength (MPa) |
Elongation (%) |
Y.S/T.S |
API SPEC 5L |
PLS1 |
L245B |
min |
245 |
415 |
b |
- |
L290X42 |
min |
290 |
415 |
b |
- |
||
L320X46 |
min |
320 |
435 |
b |
- |
||
L360X52 |
min |
360 |
460 |
b |
- |
||
L390X56 |
min |
390 |
490 |
b |
- |
||
L415X60 |
min |
415 |
520 |
b |
- |
||
L450X60 |
min |
450 |
535 |
b |
- |
||
L485X70 |
min |
485 |
570 |
b |
- |
||
PLS2 |
L245N BN |
min |
245 |
415 |
b |
- |
|
L245M BM |
max |
450 |
760 |
b |
0.93 |
||
L290NX42N |
min |
290 |
415 |
b |
- |
||
L290MX42M |
max |
495 |
760 |
b |
0.93 |
||
L320NX46N |
min |
320 |
435 |
b |
- |
||
L320MX46M |
max |
525 |
760 |
b |
0.93 |
||
L360NX52N |
min |
360 |
460 |
b |
- |
||
L360MX52M |
max |
530 |
760 |
b |
0.93 |
||
L390NX56N |
min |
390 |
490 |
b |
- |
||
L390MX56M |
max |
545 |
760 |
b |
0.93 |
||
L415NX60N |
min |
415 |
520 |
b |
- |
||
L415MX60M |
max |
565 |
760 |
b |
0.93 |
||
L450MX65M |
min |
450 |
535 |
b |
- |
||
max |
600 |
760 |
b |
0.93 |
|||
L485MX70M |
min |
485 |
570 |
b |
- |
||
max |
635 |
760 |
b |
0.93 |
|||
L555MX80M |
min |
555 |
625 |
b |
- |
||
max |
705 |
825 |
b |
0.93 |
Standard |
Grade |
Transverse minimum impact of Pipe body |
Transverse minimum impact of weld (J) |
|||||
(J) |
||||||||
D=508 |
508mm |
762mm |
914mm |
1219mm |
D<1422mm |
D=1422mm |
||
API SPEC 5L |
“=L415×60” |
27(20) |
27(20) |
40(30) |
40(30) |
40(30) |
27(20) |
40(30) |
>L415×60 |
27(20) |
27(20) |
40(30) |
40(30) |
54(40) |
27(20) |
40(30) |
|
“=L415×65” |
||||||||
>L450×65 |
27(20) |
27(20) |
40(30) |
40(30) |
54(40) |
27(20) |
40(30) |
|
“=L485×70” |
||||||||
>L485×70 |
40(30) |
40(30) |
40(30) |
40(30) |
54(40) |
27(20) |
40(30) |
|
“=L555×80” |
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Note:(1)The values in the table be suitable for the full size standard sample. |
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(2) The values inside bracket is the minimum single value, outside bracket is the average value. |
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(3) Test Temperature: 0°C. |