National Pipe Company (NPC) logo
Bevelled end of a large diameter steel pipe

Products

Two mills. One standard of precision.

Helical and longitudinal submerged arc welded line pipe, manufactured to API 5L and supplied with a complete inspection dossier.

Dimensional range

Mill capability

Pipe dimensional rangeDhahran plant · SAW process
MillHelical seam SAW
Outside diameter508 – 2134 mm
OD (inch)20″ – 84″
Wall thickness6.4 – 22.2 mm
Lengthup to 24 m
Capacity250,000 MT/y
MillLongitudinal seam SAW
Outside diameter610 – 1524 mm
OD (inch)24″ – 60″
Wall thickness6.4 – 30.5 mm
Lengthup to 12.2 m
Capacity180,000 MT/y

Materials

Grades & mechanical properties

API 5L grade matrixIndicative minimum values — project specifications govern
GradeAPI 5L Gr. B
Min. yield (MPa)245
Min. tensile (MPa)415
Typical serviceWater & general transmission
GradeAPI 5L X42
Min. yield (MPa)290
Min. tensile (MPa)415
Typical serviceLow-pressure oil lines
GradeAPI 5L X52
Min. yield (MPa)360
Min. tensile (MPa)460
Typical serviceOil & gas gathering
GradeAPI 5L X60
Min. yield (MPa)415
Min. tensile (MPa)520
Typical serviceHigh-pressure transmission
GradeAPI 5L X65
Min. yield (MPa)450
Min. tensile (MPa)535
Typical serviceHigh-pressure transmission
GradeAPI 5L X70
Min. yield (MPa)485
Min. tensile (MPa)570
Typical serviceLong-distance gas trunk lines

Supply by application

Where our pipe goes

Oil transmission

Helical / longitudinal, bevelled ends, external coating.

Gas transmission

Longitudinal SAW with 3LPE / FBE coating.

Water pipelines

Helical SAW with cement mortar lining.

Structural piling

Helical SAW, plain ends.

Casing & conductor

Longitudinal SAW, threaded or bevelled.

Slurry lines

Helical SAW, heavy wall with abrasion allowance.

Contact

Tell us about your pipeline.

Send us your specification — diameter, wall thickness, grade, coating and tonnage — and our team will come back with availability and lead times.

  • Plant & head office

    P.O. Box 1099, Dhahran, Eastern Province, Saudi Arabia

  • Sales office

    +966 13 882 5266

  • Commercial department

    sales_dept@npc.com.sa

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