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API 5L X56 PSL2 Pipe

Of the two product specification levels, the much detailed API 5L X56m PSL2 contains stricter chemical physicals, with an additional testing requirement along with different ceiling limits of mechanical properties, besides requiring Charpy impact testing conditions. To elaborate, under the API 5L X56 PSL2 additional testing requirements include non-destructive inspection of seamless products, certification to SR15, CVN testing, as well as mandatory traceability throughout the entire production process. In grilling an X56 Grade Casing is referred to as a system of both identifying as well as categorizing the strength of materials used for the casing. Generally, pipes produced according to API 5L specification are often indicative of their strength properties.

API 5L X56 PSL2 Pipe

In this instance, the API 5L X56 Pipe gives away its yield strength in PSI, which would be valued at 56000 PSI. On the other hand the same grade pipe but if referred to as its tensile strength in Mpa would be the L390 Pipe, wherein the mentioned tensile strength would be approx. 390Mpa. The X56 Steel Pipe could be either produced in a welded or a seamless manner. While the seamless manner could be either hot formed or cold worked, the welded API 5L Grade X 56 Pipe would have a changed or controlled chemistry pertaining to the content of carbon in the alloy. As associated with good weldable properties, these pipes would have a reduction in the content of carbon. Hence, this chemistry controlled API 5L X56m pipe could be used in industries that lists good weldability as one of the primary requirements.

Specification chart of API 5L X56 PSL2 Pipe

API 5L X56 Seamless 1/2” NB – 60” NB
Standard API, ASTM, ISO 3183, ASME
API 5L X56 PSL2 ERW 1/2” NB – 24” NB
X56 Steel LSAW / DSAW 16’OD TO 54′ OD (8 MM TO 50 MM THK)
Grade B X56 SAW 16” NB – 100” NB
Wall Thick. SCH10, 20, 30, STD, 40, 60, XS, 80, 100, 120, 140, 160, XXS DIN, JIS
Test HIC / SSC TEST, NACE MR0175 / TM0177 / TM0284, H2 SERVICE, IBR etc.
PSL Level
  • API 5L X56 PSL 1
  • API 5L X56 PSL 2

Dimensions of X56 Steel Pipe

Seamless Pipe size 2 to 28"
Welded Pipe size (LSAW) 80"

API 5L Grade X 56 Pipe Composition Standard

Grade Composition, %
C max Mn max P S max V max Nb max Ti max
min max
B 0.28 1.2 - 0.03 0.03 c.d c,d d
X56 0.28 1.4 - 0.03 0.03 d d d

Mechanical Behaviour of API 5L X56m PSL2 Pipe

API 5L X56 PSL 1 Mechanical Properties
Grade Yield Strength Mpa Tensile Strength Mpa Elongation
B 245 415 c
X56 390 490 c

Equivalent Material of L390 Grade X56 Seamless Pipe

Products Level Specification
PSL1 L390 or x56
PSL2 L390N or X56N
L390Q or X56Q
L390M or X56M

Minimum Yield Strength of L390 Pipe

API 5L X56 Pipe Suppliers PSL2
Minimum Yield Strength: 56,000 psi
Maximum Yield Strength: 79,000 psi
Minimum Tensile Strength: 71,000 psi
Maximum Tensile Strength: 110,000 psi
Notes: This is a standard line pipe grade specifiedin API (American Petroleum Institute) specification 5L.

Coatings of X56 Grade Casing

  • 3LPP Coating
  • 3LPE Coated
  • Internal Coating Epoxy
  • Coated Bare Steel
  • Cement Lined Steel
  • PTFE Lined Powder
  • Coated Black
  • PE Coated
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