API 5L X70 PSL 1 / PSL 2 Pipes

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API 5L X 70 PSL 1 Pipes

Chemical Composition of API 5L X70 PSL 1
Mass fraction, based upon heat and product analysis a
Seamless Pipe
C Mn P S V Nb Ti
maxb max.b min. max. max. max. max. max.
0.28e 1.40e – 0.030 0.030 f f f
Welded Pipe
0.26e 1.65e – 0.030 0.030 f f f
  1. 0.50% maximum for copper, 0.50% maximum for nickel, 0.50% maximum for chromium, and 0.15% maximum for molybdenum.
  2. For each reduction of 0.01% below the specified maximum concetration for carbon, an increase of 0.05%
  3. Unless otheriwse agreed.
  4. unless otherwise agreed, the sum of niobium, vanadium and titanium concentrations shall be = 0.15%
Mechanical Requirements
Y.S T.S Elongation
Mpa(psi) Mpa(psi)
min min min
485(70 300) 570(82 700) f

API 5L X70 PSL 2 Pipes

Chemical Composition API 5L X70 PSL 2
Mass fraction, based upon heat and product analysis % maximum Carbon Equivalent A
% Maximum
Cb Si Mnb P S V Nb Ti Other CEIIW CEPcm
Seamless & Welded Pipes
L485Q or X70Q 0.18f 0.45f 1.8f 0.025 0.015 g g g h 0.43 0.25
Welded Pipe
L485M OR X70M 0.12f 0.45f 1.7f 0.025 0.015 g g g h 0.43f 0.25
  1. unless otherwise agreed, the sum of th niobium & vanadum concentrations shall be = 0.06%
  2. Unless otherwise agreed, 0.50% maximum for copper, 0.30% maximum for nickel, 0.30% maximum for chromium, & 0.15% maximum for molybdenum.
  3. the sum of th niobium & vanadum & titanium concentrations shall be =0.15%
  4. Unless otherwise agreed, 0.50% maximum for copper, 0.30% maximum for nickel, 0.30% maximum for chromium, & 0.15% maximum for molybdenum.
  5. Unless otherwise agreed g unless otheriwse agreed the sum of th niobium & vanadum & titanium concentrations shall be =0.15%
Mechanical Requirements
Y.S T.S Elongation
Mpa(psi) Mpa(psi)
min min min
485(70 300) 635(92 100) f

The specified minimum elongation, Af,   shall be as determined using the following equation:

API 5L X 70 PSL 1 / 2 Usage

American Petroleum Institute standard 5L. API pipes & API 5L X 70 PSL 1 / 2 are exclusively used for transmission of gas and petroleum products.

API 5L X70 PSL 1 / 2 Specification

API 5L X70 (PSL1) (PSL2)
Minimum Yield Strength: 70,300 psi 70,300 psi
Maximum Yield Strength: None 92,100 psi
Minimum Tensile Strength: 82,700 psi 82,700 psi
Maximum Tensile Strength: None 110,200 psi
Notes: This is a standard line pipe grade specified in API (American Petroleum Institute) specification 5L.