API 5L Seamless Line Pipe

Forever Steel Manufacturing Co., Ltd
API 5L seamless line pipe,seamless line pipe,SMLS line pipe,API 5L pipe,X52 pipe,X60 pipe,X65 pipe

Product Category

Latest news list

  • steel pipe inspection,pre-shipment inspection,MTC,NDT,hydrostatic test,coating inspection
    Steel Pipe Inspection Checklist Before Shipment
    This checklist explains how to inspect steel pipes before shipment,including material certificates,dimensions,surface condition,testing records,coating quality,marking,packaging and loading,
  • API 5L line pipe,oil and gas pipeline,PSL1,PSL2,ERW line pipe,seamless line pipe
    API 5L Line Pipe Selection Guide for Oil and Gas Projects
    Learn how to choose API 5L line pipe for oil and gas projects,including pipe type,steel grade,PSL level,wall thickness,coating,inspection and documentation requirements,
  • API 5CT casing and tubing,OCTG casing and tubing,oil well casing and tubing,casing and tubing for oil and gas wells,API 5CT grades,API 5CT connection types,API 5CT thread types,API 5CT J55 casing
    API 5CT Casing and Tubing Complete Guide
    This guide explains the basic functions,grades,connection types,inspection requirements and application scenarios of API 5CT casing and tubing,It helps oil and gas buyers,drilling contractors and project engineers understand how to select suitable OCTG materials for different well conditions,including shallow wells,deep wells,sour service environments and high-pressure drilling projects,
  • pipe schedule chart,steel pipe schedule chart,pipe schedule table,SCH 40 pipe dimensions,SCH 80 pipe dimensions,pipe wall thickness
    Pipe Schedule Chart: Steel Pipe Dimensions and Wall Thickness
    Check the pipe schedule chart for steel pipe outside diameter,wall thickness and common SCH 40,SCH 80 and SCH 160 dimensions used in industrial pipeline projects,
  • Coated steel pipe transportation,3LPE pipe protection,FBE coating safety,steel pipe logistics Middle East,hemp rope pipe buffering
    How to Prevent Surface Damage to Coated Steel Pipes During Transportation
    Specialized Protection Protocols for Coated Steel Pipe Logistics Overview At **Forever Steel**,we understand that a steel pipe is only as good as its surface condition upon arrival,For projects in **South America** and the **Middle East**,our focus is on preventing "Holiday" (coating gaps) and mechanical gouges during the complex multi-modal transport process,Multi-Layered Material Protection We utilize a combination of traditional and modern soft-protection materials to ensure the safety of 3LPE,FBE,and 3LPP coatings: * **Hemp Rope Spiraling**: Thick hemp ropes are coiled around the pipe body to maintain a fixed safety distance between pipes,eliminating friction during sea-transit,* **Straw Mat Interlining**: Heavy-duty straw mats are placed on all timber dunnage to absorb shocks and prevent pressure-point marks on the coating,* **Non-Woven Fabric Shielding**: For sensitive FBE coatings,we offer full-body wrapping in high-density non-woven fabric to protect against dust,UV rays,and micro-abrasions,Compliance & Quality Assurance All our handling and loading procedures follow **API 5L** transportation guidelines and **ISO 21809** standards,We use only nylon webbing slings and padded hooks—**zero metal-to-metal contact** is guaranteed throughout the loading process,Why Choose Forever Steel? Our commitment to detail reduces your project’s "On-Site Repair" costs,We provide a complete **Loading & Bracing Plan** with every shipment,ensuring that your procurement team has full transparency over the safety of your assets,

API 5L Seamless Line Pipe

SMLS Line Pipes
API 5L Grade B and X52 seamless line pipe for high pressure gas transmission
High strength API 5L X65 PSL2 seamless steel pipe for offshore pipelines
Tubería de línea sin costura API 5L X42 X52 PSL1 para petróleo y gas
Anti-corrosive seamless line pipe with internal coating for oilfield service

Product Name: API 5L Seamless Line Pipe, SMLS Line Pipe
Outer Diameter: 10.3 mm - 1219.2 mm
Wall Thickness: 1.65 mm - 60 mm
Length: 5.8 m, 6 m, 11.8 m, 12 m or custom length
Surface: Oiled or unoiled
Ends: Plain end, beveled end, with pipe caps
Standards and Grades: API 5L Grade B, X42, X52, X60, X65, X70; ASTM A106 Grade B; ASTM A53 Grade A/B; DIN 17175; EN 10216-2; DIN 2391; EN 10305-1; EN 10210 S235JR, S275JR, S355JR
Packing: Bundled or in bulk
Applications: Oil, gas, water and fluid transmission pipelines




  • Overview
  • Specification
  • Standard
  • Process
  • Packing

High-Performance Seamless (SMLS) Steel Line Pipes

Our seamless steel line pipes are engineered for the reliable transportation of oil, gas, water, and hydrocarbon fluids in the most demanding environments. Manufactured using advanced hot-rolling and cold-drawing techniques, these pipes offer superior structural integrity, uniform wall thickness, and higher pressure ratings compared to welded alternatives.


1. Technical Specifications

Outside Diameter (OD):10.3 mm – 914.4 mm (1/8" to 36")

Wall Thickness (WT):1.73 mm – 100 mm (SCH 10 to SCH XXS)

Length:Single Random (SRL), Double Random (DRL), or Fixed Lengths (up to 12m or 18m).

Manufacturing Process:Hot Finished Seamless (HFS) and Cold Drawn Seamless (CDS).


2. Industry Standards & Material Grades

We provide line pipes that strictly adhere to international quality benchmarks, supplied with fullMTC (Material Test Certificates).

API 5L (PSL1 & PSL2):Grade B, X42, X46, X52, X56, X60, X65, X70, X80.

ASTM A106:Grade B, Grade C (High-Temperature Service).

ASTM A53:Grade B.

DIN/EN Standards:EN 10208-1/2 (L245, L290, L360).


3. Key Applications

Oil & Gas Midstream:Onshore and offshore transmission pipelines for crude oil and natural gas.

Refinery & Petrochemical:High-pressure fluid transport within processing plants.

Infrastructure:High-pressure water mains and geothermal piping systems.

Extreme Environments:Specialized "Sour Service" grades for H2S-containing environments and low-temperature service.


4. Surface Protection & Packaging

To ensure zero-defect delivery and long-term corrosion resistance:

Coating Options:3PE (Three-Layer Polyethylene), FBE (Fusion Bonded Epoxy), Black Vanish, or Galvanized coating.

End Treatment:Beveled ends (30°±5°) for easy welding, or plain ends with plastic caps.

Export Packing:Hexagonal bundles with steel strips, marking/stencil according to project requirements, and sea-worthy packaging for container or bulk shipment.


5. Quality Assurance

Every pipe undergoes rigorous non-destructive testing (NDT), including:

Hydrostatic Testingto verify pressure containment.

Ultrasonic (UT) & Eddy Current Testingfor internal flaw detection.

Chemical & Mechanical Analysisto ensure exact grade compliance.

Seamless Steel Pipe Specifications Up To 36

Outer Diameter (OD) Wall Thickness (WT) Range Length Range Common Schedule / Standards
1/2" (21.3 mm) 2.11 mm – 7.47 mm 5.8m – 12.0m SCH 40, 80, 160, XXS
1" (33.4 mm) 2.77 mm – 9.09 mm 5.8m – 12.0m ASTM A106 / API 5L
2" (60.3 mm) 2.77 mm – 11.07 mm 5.8m – 12.0m SCH 40, 80, 160, XXS
4" (114.3 mm) 3.18 mm – 17.12 mm 5.8m – 12.0m Standard Line Pipe
6" (168.3 mm) 3.40 mm – 21.95 mm 5.8m – 12.0m SCH 40, 80, 120, 160
8" (219.1 mm) 3.76 mm – 23.01 mm 5.8m – 12.0m Oil & Gas Conveyance
10" (273.1 mm) 4.19 mm – 28.58 mm 5.8m – 12.0m SCH 40, 60, 80, 100
12" (323.9 mm) 4.57 mm – 33.32 mm 5.8m – 12.0m Power Plant Piping
14" (355.6 mm) 6.35 mm – 35.71 mm 5.8m – 12.0m ASTM A333 (Low Temp)
16" (406.4 mm) 6.35 mm – 40.49 mm 5.8m – 12.0m High Temp Service
20" (508.0 mm) 6.35 mm – 50.01 mm 5.8m – 12.0m Heavy Wall Thickness
24" (609.6 mm) 6.35 mm – 59.54 mm 5.8m – 12.0m Standard Max Pierced OD
28" (711.2 mm) 7.92 mm – 60.00 mm 5.8m – 12.0m Hot Expanded SMLS
32" (812.8 mm) 9.53 mm – 60.00 mm 5.8m – 12.0m Critical Pressure Vessels
36" (914.4 mm) 9.53 mm – 60.00 mm 5.8m – 12.0m Large Diameter Seamless


Steel Pipe Mechanical and Chemical Properties

  Chemical Components (%) Mechanical Properties Impact Test
Standard / Grade C (%) Si (%) Mn (%) P (%) S (%) Tensile (MPa) Yield (MPa) Elong. (%) Impact Temp Impact Energy (J)
ASTM A106 Gr.B 0.3 0.1 0.29-1.06 0.035 0.035 415 240 30 N/A N/A
ASTM A106 Gr.C 0.35 0.1 0.29-1.06 0.035 0.035 485 275 30 N/A N/A
API 5L B (PSL1) 0.28 --- 1.2 0.03 0.03 415 245 23 N/A N/A
API 5L X42 (PSL1) 0.28 --- 1.3 0.03 0.03 415 290 23 N/A N/A
API 5L X46 (PSL1) 0.28 --- 1.4 0.03 0.03 435 320 22 N/A N/A
API 5L X52 (PSL1) 0.28 --- 1.4 0.03 0.03 460 360 21 N/A N/A
API 5L X56 (PSL1) 0.28 --- 1.4 0.03 0.03 490 390 19 N/A N/A
API 5L X60 (PSL1) 0.28 --- 1.4 0.03 0.03 520 415 19 N/A N/A
API 5L X65 (PSL1) 0.28 --- 1.45 0.03 0.03 535 450 18 N/A N/A
API 5L Gr.B (PSL2) 0.24 0.4 1.2 0.025 0.015 415 245-450 23 0 °C 27 J
API 5L X42 (PSL2) 0.24 0.4 1.3 0.025 0.015 415 290-496 23 0 °C 27 J
API 5L X52 (PSL2) 0.24 0.45 1.4 0.025 0.015 460 360-530 21 0 °C 27 J
API 5L X60 (PSL2) 0.24 0.45 1.4 0.025 0.015 520 415-565 19 0 °C 27 J
API 5L X65 (PSL2) 0.24 0.45 1.45 0.025 0.015 535 450-600 18 0 °C 27 J
ASTM A333 Gr.1 0.3 --- 0.40-1.06 0.025 0.025 380 205 35 -45 °C 18 J
ASTM A333 Gr.3 0.19 0.18-0.37 0.31-0.64 0.025 0.025 450 240 30 -100 °C 18 J
ASTM A333 Gr.6 0.3 0.10 min 0.29-1.06 0.025 0.025 415 240 30 -45 °C 18 J
EN 10210 S235JR 0.17 --- 1.4 0.035 0.035 360-510 235 26 20 °C 27 J
EN 10210 S235J0H 0.17 --- 1.4 0.03 0.03 360-510 235 26 0 °C 27 J
EN 10210 S235J2H 0.17 --- 1.4 0.025 0.025 360-510 235 26 -20 °C 27 J
EN 10210 S275JR 0.21 --- 1.5 0.035 0.035 410-560 275 23 20 °C 27 J
EN 10210 S275J0H 0.21 --- 1.5 0.03 0.03 410-560 275 23 0 °C 27 J
EN 10210 S275J2H 0.21 --- 1.5 0.025 0.025 410-560 275 23 -20 °C 27 J
EN 10210 S355JR 0.22 0.55 1.6 0.035 0.035 470-630 355 22 20 °C 27 J
EN 10210 S355J0H 0.22 0.55 1.6 0.03 0.03 470-630 355 22 0 °C 27 J
EN 10210 S355J2H 0.22 0.55 1.6 0.025 0.025 470-630 355 22 -20 °C 27 J

SMLS Pipe Standards Technical Data

Standard Feature Dimension Range Tolerance (Permissible Variation)
ASTM A106 / A53 Outside Diameter 1/8" to 1-1/2" (DN6-40) ±0.40 mm
2" to 4" (DN50-100) ±0.80 mm
5" to 8" (DN125-200) +1.60 mm / -0.80 mm
> 8" (DN200) +1.6% OD / -0.8% OD
Wall Thickness All Sizes -12.5% (No max limit specified)
Length Single Random (SRL) 4.8m – 6.7m (min 90% of load)
API 5L (PSL1/PSL2) Outside Diameter < 2-3/8" (60.3mm) +0.41 mm / -0.80 mm
2-3/8" to 24" ±0.75% OD
> 24" ±1.0% OD
Wall Thickness ≤ 4.0 mm +0.6 mm / -0.5 mm
4.0 mm to 25.0 mm +15.0% / -12.5%
Length Custom/Standard ± 500 mm (or as per agreement)
EN 10210 / 10216 Outside Diameter All Sizes ±1% (Min ±0.5 mm)
Wall Thickness All Sizes ±12.5% (Min ±0.4 mm)
Straightness Total Length ≤ 0.2% of total length

Hot-Rolled Seamless Steel Pipe Production Process

Seamless Steel Pipe Specifications Up To 36

Outer Diameter (OD) Wall Thickness (WT) Range Length Range Common Schedule / Standards
1/2" (21.3 mm) 2.11 mm – 7.47 mm 5.8m – 12.0m SCH 40, 80, 160, XXS
1" (33.4 mm) 2.77 mm – 9.09 mm 5.8m – 12.0m ASTM A106 / API 5L
2" (60.3 mm) 2.77 mm – 11.07 mm 5.8m – 12.0m SCH 40, 80, 160, XXS
4" (114.3 mm) 3.18 mm – 17.12 mm 5.8m – 12.0m Standard Line Pipe
6" (168.3 mm) 3.40 mm – 21.95 mm 5.8m – 12.0m SCH 40, 80, 120, 160
8" (219.1 mm) 3.76 mm – 23.01 mm 5.8m – 12.0m Oil & Gas Conveyance
10" (273.1 mm) 4.19 mm – 28.58 mm 5.8m – 12.0m SCH 40, 60, 80, 100
12" (323.9 mm) 4.57 mm – 33.32 mm 5.8m – 12.0m Power Plant Piping
14" (355.6 mm) 6.35 mm – 35.71 mm 5.8m – 12.0m ASTM A333 (Low Temp)
16" (406.4 mm) 6.35 mm – 40.49 mm 5.8m – 12.0m High Temp Service
20" (508.0 mm) 6.35 mm – 50.01 mm 5.8m – 12.0m Heavy Wall Thickness
24" (609.6 mm) 6.35 mm – 59.54 mm 5.8m – 12.0m Standard Max Pierced OD
28" (711.2 mm) 7.92 mm – 60.00 mm 5.8m – 12.0m Hot Expanded SMLS
32" (812.8 mm) 9.53 mm – 60.00 mm 5.8m – 12.0m Critical Pressure Vessels
36" (914.4 mm) 9.53 mm – 60.00 mm 5.8m – 12.0m Large Diameter Seamless


Steel Pipe Mechanical and Chemical Properties

  Chemical Components (%) Mechanical Properties Impact Test
Standard / Grade C (%) Si (%) Mn (%) P (%) S (%) Tensile (MPa) Yield (MPa) Elong. (%) Impact Temp Impact Energy (J)
ASTM A106 Gr.B 0.3 0.1 0.29-1.06 0.035 0.035 415 240 30 N/A N/A
ASTM A106 Gr.C 0.35 0.1 0.29-1.06 0.035 0.035 485 275 30 N/A N/A
API 5L B (PSL1) 0.28 --- 1.2 0.03 0.03 415 245 23 N/A N/A
API 5L X42 (PSL1) 0.28 --- 1.3 0.03 0.03 415 290 23 N/A N/A
API 5L X46 (PSL1) 0.28 --- 1.4 0.03 0.03 435 320 22 N/A N/A
API 5L X52 (PSL1) 0.28 --- 1.4 0.03 0.03 460 360 21 N/A N/A
API 5L X56 (PSL1) 0.28 --- 1.4 0.03 0.03 490 390 19 N/A N/A
API 5L X60 (PSL1) 0.28 --- 1.4 0.03 0.03 520 415 19 N/A N/A
API 5L X65 (PSL1) 0.28 --- 1.45 0.03 0.03 535 450 18 N/A N/A
API 5L Gr.B (PSL2) 0.24 0.4 1.2 0.025 0.015 415 245-450 23 0 °C 27 J
API 5L X42 (PSL2) 0.24 0.4 1.3 0.025 0.015 415 290-496 23 0 °C 27 J
API 5L X52 (PSL2) 0.24 0.45 1.4 0.025 0.015 460 360-530 21 0 °C 27 J
API 5L X60 (PSL2) 0.24 0.45 1.4 0.025 0.015 520 415-565 19 0 °C 27 J
API 5L X65 (PSL2) 0.24 0.45 1.45 0.025 0.015 535 450-600 18 0 °C 27 J
ASTM A333 Gr.1 0.3 --- 0.40-1.06 0.025 0.025 380 205 35 -45 °C 18 J
ASTM A333 Gr.3 0.19 0.18-0.37 0.31-0.64 0.025 0.025 450 240 30 -100 °C 18 J
ASTM A333 Gr.6 0.3 0.10 min 0.29-1.06 0.025 0.025 415 240 30 -45 °C 18 J
EN 10210 S235JR 0.17 --- 1.4 0.035 0.035 360-510 235 26 20 °C 27 J
EN 10210 S235J0H 0.17 --- 1.4 0.03 0.03 360-510 235 26 0 °C 27 J
EN 10210 S235J2H 0.17 --- 1.4 0.025 0.025 360-510 235 26 -20 °C 27 J
EN 10210 S275JR 0.21 --- 1.5 0.035 0.035 410-560 275 23 20 °C 27 J
EN 10210 S275J0H 0.21 --- 1.5 0.03 0.03 410-560 275 23 0 °C 27 J
EN 10210 S275J2H 0.21 --- 1.5 0.025 0.025 410-560 275 23 -20 °C 27 J
EN 10210 S355JR 0.22 0.55 1.6 0.035 0.035 470-630 355 22 20 °C 27 J
EN 10210 S355J0H 0.22 0.55 1.6 0.03 0.03 470-630 355 22 0 °C 27 J
EN 10210 S355J2H 0.22 0.55 1.6 0.025 0.025 470-630 355 22 -20 °C 27 J

SMLS Pipe Standards Technical Data

Standard Feature Dimension Range Tolerance (Permissible Variation)
ASTM A106 / A53 Outside Diameter 1/8" to 1-1/2" (DN6-40) ±0.40 mm
2" to 4" (DN50-100) ±0.80 mm
5" to 8" (DN125-200) +1.60 mm / -0.80 mm
> 8" (DN200) +1.6% OD / -0.8% OD
Wall Thickness All Sizes -12.5% (No max limit specified)
Length Single Random (SRL) 4.8m – 6.7m (min 90% of load)
API 5L (PSL1/PSL2) Outside Diameter < 2-3/8" (60.3mm) +0.41 mm / -0.80 mm
2-3/8" to 24" ±0.75% OD
> 24" ±1.0% OD
Wall Thickness ≤ 4.0 mm +0.6 mm / -0.5 mm
4.0 mm to 25.0 mm +15.0% / -12.5%
Length Custom/Standard ± 500 mm (or as per agreement)
EN 10210 / 10216 Outside Diameter All Sizes ±1% (Min ±0.5 mm)
Wall Thickness All Sizes ±12.5% (Min ±0.4 mm)
Straightness Total Length ≤ 0.2% of total length

Hot-Rolled Seamless Steel Pipe Production Process

Relevant Products

API 5L Seamless Line Pipe Supplier,X52 X60 X65

Contact

facebooklinkedin

Products

Projects

Quick Links

Copyright © 2026 Forever Steel Manufacturing Co., Ltd  All rights reserved.

Find what you need ?

close