API 5L X80 Pipe

API 5L X80 pipes have seamless, welded or ERW processes to for the pipes. These are carbon steel pipes with high yield and tensile strength. The minimum yield strength is at 80000PSI. API 5L X80 PSL2 and the API 5L X80 PSL1 are used in the same industries with slightly different mechanical properties. The nominal bore size of the pipes range from ½ inches to 48 inches. The wall thickness differs with schedules 10 through XXS. The pipes are available in single random, double random and in required lengths. The API 5L Grade X80 can come in annealed, heat treated, bent, 3LPE coated, sand blasted and drawn or expanded according to customer requirements. The applications of API 5L X80 Grade B include petrochemical applications, oil refineries, nuclear and thermal power generation plants, boiler parts and pressure vessels. There are specific testing available to assure the qualities of the pipes. The HIC Tested X80 is tested against hydrogen embrittlement and it could be used without getting embrittled. The ISO 3183 L555 Grade X80 is a standard that also specifies the qualities of the pipe. The pipes have a high tensile strength at 95000MPa as well. However, the PSL2 has higher minimum yield strength of up to 92000PSI and tensile strength of up to 125000PSI.

X80 Carbon Steel Pipe Specification Table


Seamless/ SAW/ ERW / LSAW / DSAW

2" to 24" O.D.


Wall Thickness

Schedule 10 to 160, STD, XS, XXS


Pipe End

Plain, Bevelled

Standard and Dimensions
Trade Name API SPEC 5L ISO 3183 PSL1 / PSL2 X80, ASTM A106/ A53/ A333 Grade 6/ API 5L GR.B X80
Standard GB/T14975, GB/T3091, GB13296-91, ANSI/API GB/T14976, ASME B36.10, GB/T9711 EN10296, ASTM A139, ASTM A333/A333M, ISO3183, API 5CT, 5L, ASTM A106/A106M, ASTM A53/A53M, GB9948, ASTM
Product Specification Level (PSL)
  • Grade A25 X80 PSL1
  • Grade B X80 PSL2
Pipe End
  • X80 PSL1 : Plain, threaded, special coupling pipe, bevelled
  • X80 PSL2 : Plain-end
PSL1 Grade
  • Grade A
  • Grade B
Various Manufacturing Process are SAWL, LFW, SAWH, SMLS, LW, HFW
Length 6-12 meters
Test procedure SSC, H2 SERVICE, TM0177, DWT, TM0284, Hardness, IBR, HIC, CVN impact, NACE MR0175
Equivalent grades table
Material Origins Korean, European, Ukraine, Indian, Japanese, US, Russian
Mill Test Certificate (MTC) EN 10204/3.1B

API 5L X80 PSL2 Pipe Various types

API 5l X80 PSL2 Seamless Pipe

API 5l X80 PSL2 Seamless Pipe

Seamless Line Pipe and Steel Piles, High Yield Pipe/ Casing

X80 Carbon Steel Pipeline

X80 Carbon Steel Pipeline

Welded Steel Line Pipes, Helical Steel Pipes

X80 Carbon Steel Pipeline

X80 Carbon Steel Pipeline

Sour Service Line Pipes, Sawh Pipeline, Piling

Indication of "M" on marked X80M PSL2 Line Pipe

Grade Letter Delivery Condition
X80M "M" letter means Thermomechanical rolled or thermomechanical formed

What "Q" shows on marked X80Q PSL2 pipelines?

Grade Letter Delivery Condition
X80Q "Q" letter means Quenched and tempered

What is "N" marked on X80N PSL2 Pipe?

Grade Letter Delivery Condition
X80N "N" letter means normalized or normalized and tempered, Normalizing rolled, normalizing formed

API 5L X80 USC Unit name

ISO 3183 L555 / L555Q / L555N / L555M 

PSL2 X80 repairing is allowed?

Defected X80 PSL2 Pipe is not repairable and PSL1 Pipe can be repair by welding as per manufacturer & buyer's agreement.

X80 Steel Pipe Coating Selection

X80 Steel Pipe Coating Types

API 5L X80 Fluid Pipe Material Equivalent

EN Material
#1.8978 / EN10208-2 L555MB

Grade B X80 High Yield Pipe Composition Chart

PSL2 X80

C Maximum Mn Maximum P Maximum S Maximum
00.24 1.40 00.025 00.015

X80 PSL2 Seamless Line Pipe Mechanical Characteristics

Yield Stress (MPa) Tensile Stress (MPa)
552-690 621-827

Grade X80 Sour Service Line Pipes Used for Temperature

Hot-coated Grade with epoxy powder Temperature
X80 Casing 550°C to 650°C

X80 Pipelines Pressure Flow Rating

555 Mpa 80 000 Psi

API 5L X80 PSL2 Uses and Applications

  • Crude oil and gasoline transmissions
  • To safely hold liquid petroleum products
  • Underground oil and gas transmissions
  • Storing petroleum liquids
API 5L X80 PSL2 Application
  • PSL2 Pipe are more expensive than PSL1, these linepipes are mainly used in oil and gas industries.

Linepipes are used to transport natural gas & oil for long-distance.