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Steel Scaffolding Plank

Line Pipe is one of the transportation method used for transporting oil, natural gas and water through pipeline to the oil and gas industry. API 5L welded steel pipe is mainly used for the delivery of the onshore and offshore oil and gas, coal slurry, the slurry media and offshore platforms, power plants, chemical industry and urban construction, structural tubes.
  • Specification
  • Chemical Analysis
  • Mechanical Properties
  • Tolerance
  • Toughness
  • Case Study

Tolerance

Pipe Types Pipe Size (mm) Tolerances
Hot Rolled
OD ≤159 ±1.0%
>159 ±1.20%
WT ≤20 ±12.5%
>20 ±10.0%
Cold Drawn
OD ≤30 ±0.20mm
30-50 ±0.30mm
>50 ±0.8%
WT ≤3 +12%  -10%
>3 ±10%

Chemical Composition & Mechanical Properties

Grade Chemical Composition
Mechanical Properties
C Mn Si Cr Mo Ni S P Tensile Strength(Mpa) Yield Strength(Mpa) Elongation(%)
10 0.07-0.14 0.35-0.65 0.17-0.37 ≤0.15 - ≤0.25 ≤0.035 ≤0.035 330-490 ≥205 ≥24
20 0.17-0.24 0.35-0.65 0.17-0.37 ≤0.25 - ≤0.25 ≤0.035 ≤0.035 410-550 ≥245 ≥21
12CrMo 0.08-0.15 0.40-0.70 0.17-0.37 0.40-0.70 0.40-0.55 ≤0.30 ≤0.035 ≤0.035 410-560 ≥205 ≥21
15CrMo 0.12-0.18 0.40-0.70 0.17-0.37 0.80-1.10 0.40-0.55 ≤0.30 ≤0.035 ≤0.035 440-640 ≥235 ≥21
1Cr2Mo ≤0.15 0.30-0.60 0.50-1.00 2.15-2.85 0.40-0.65 - ≤0.035 ≤0.035 ≥390 ≥175 ≥22
1Cr5Mo ≤0.15 ≤0.60 ≤0.60 4.00-6.00 0.45-0.60 ≤0.60 ≤0.035 ≤0.035 ≥390 ≥195 ≥22

Tolerance

Pipe Types Pipe Size (mm) Tolerances
Hot Rolled
OD ≤159 ±1.0%
>159 ±1.20%
WT ≤20 ±12.5%
>20 ±10.0%
Cold Drawn
OD ≤30 ±0.20mm
30-50 ±0.30mm
>50 ±0.8%
WT ≤3 +12%  -10%
>3 ±10%

Chemical Composition & Mechanical Properties

Grade Chemical Composition
Mechanical Properties
C Mn Si Cr Mo Ni S P Tensile Strength(Mpa) Yield Strength(Mpa) Elongation(%)
10 0.07-0.14 0.35-0.65 0.17-0.37 ≤0.15 - ≤0.25 ≤0.035 ≤0.035 330-490 ≥205 ≥24
20 0.17-0.24 0.35-0.65 0.17-0.37 ≤0.25 - ≤0.25 ≤0.035 ≤0.035 410-550 ≥245 ≥21
12CrMo 0.08-0.15 0.40-0.70 0.17-0.37 0.40-0.70 0.40-0.55 ≤0.30 ≤0.035 ≤0.035 410-560 ≥205 ≥21
15CrMo 0.12-0.18 0.40-0.70 0.17-0.37 0.80-1.10 0.40-0.55 ≤0.30 ≤0.035 ≤0.035 440-640 ≥235 ≥21
1Cr2Mo ≤0.15 0.30-0.60 0.50-1.00 2.15-2.85 0.40-0.65 - ≤0.035 ≤0.035 ≥390 ≥175 ≥22
1Cr5Mo ≤0.15 ≤0.60 ≤0.60 4.00-6.00 0.45-0.60 ≤0.60 ≤0.035 ≤0.035 ≥390 ≥195 ≥22

Tolerance

Pipe Types Pipe Size (mm) Tolerances
Hot Rolled
OD ≤159 ±1.0%
>159 ±1.20%
WT ≤20 ±12.5%
>20 ±10.0%
Cold Drawn
OD ≤30 ±0.20mm
30-50 ±0.30mm
>50 ±0.8%
WT ≤3 +12%  -10%
>3 ±10%

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