API 5L ERW Steel Pipe

Supply Range of Diameters for API 5L welded (ERW, SAW) line pipe: 1/2” to 60”

Grade: API 5L Grade B, X42, X46, X52, X56, X60, X65, X70, X80

Manufacturing types: ERW

Thickness range: SCH10 to SCH160

Ends Type: Beveled ends, Plain ends

Length options include: 6m, 12m, or customized

Plastic and iron protection caps are available

Surface appearances: Natural, Varnished, Black painting, 3PE, FBE, etc


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    API 5L line Pipe Brief Introduction

    API 5L steel line pipe is designed for oil and gas pipelines in a variety of working situations. Steel line pipe is typically made of carbon steel and meets API SPEC 5L requirements. Applied to petroleum and natural gas industries, oil industries are anticipated to work in harsh scenarios, low and high temperatures, corrosion resistance for corrosive environments, and sour services in H2S conditions.

    API 5L ERW Pipe Steel Grade and Feature

    High-quality API 5L ERW steel line pipe from Grade B up to X80.


    We supply API 5L welded ERW steel line pipe in Gr B, X42, X46, X52, X56, X60, X65, X70, X80 PSL1, PSL2, and for sour service (NACE pipe).


    Common Class: API 5L Gr. B PSL1, PSL2, Sour Service pipe

    Medium: X42, X46, X52

    Medium and high: X56

    High level: API 5L X60 PSL1, PSL2 line pipe

    High: API 5L X65 PSL1, PSL2 line pipe

    Premium high: API 5L X70

    Premium high: API 5L X80

    PSL2 pipe comes with a suffix letter of N, Q, M, e.g., API 5L X52N, API 5L X60Q/M.

    Sour service pipe with suffix letter NS, QS, MS, e.g., API 5L X65QS.


    Suffix Letter N, Q, M, S

    R: As rolled

    N: Normalizing rolled, Normalized formed, Normalized

    Q: Tempered and quenched

    M: Thermomechanical rolled or thermomechanical formed

    S: Sour Service Use

    API 5L ERW Welded Pipe Manufacturing

    Resistance pipe, which is a form of ERW pipe, differs from welded pipe and DC welded pipe in two distinct ways, as shown below. Based on the frequency of the weld, IF welding is used for low frequency and ultra-IF welding is used for high frequency. In the case of thin-walled pipe, contact welding and induction welding often employ a high-frequency weld. When small-diameter pipes are required, DC welding is utilized. Comprehensive, ERW-type pipes are produced using a high-frequency welding method. ERW longitudinal is the most suggested material for oil and gas storage due of its affordability, quality, and transportability.

    API 5L ERW Welded Pipe Manufacturing Process

    ERW process normally applied to the pipe below 24 in, 609 mm.


    ERW/HFW(Electric Resistance Welding) Longitudinally Welding Steel Line Pipe Manufacturing Flow Chart


    Uncoiling – Flattening – Shearing and Butt Welding – Loop Storing – Plate UT – Trimming – Forming – High Frequency Welding – Removal of Inside and Outside Blurs – Ultrasonic Testing – Annealed by Medium Frequency – Air Cooling – Water Cooling – Sizing – Straightness – Cutting Off – Dimension and Initial Surface Inspection – Pipe Ends Beveling – Hydrostatic Test –Off Line Ultrasonic Testing – Ultrasonic Testing for Pipe Ends – Dimension and Final Surface Inspection – Corrosion Resistant Coating – Marking – Pipe Ends Protection – Inspection

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