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  • National Pipe Company’s Helical Pipe Mills

    Helical seam SAW pipes are manufactured according to various international standards and specifications such as API 5L, ASTM A139, ASTM A252, AWWA C200, BS 3601, DIN 1626, DIN 17172, ISO 3183 and many others. Dimensional accuracy is an important factor for all-purpose pipes. Particularly, high dimensional accuracy is required for line pipe and structural purposes.

    National Pipe Company manufactures pipes from two identical and highly rigid helical pipe mills designed by Sumitomo together with BLOHM & VOSS. The mills have proven capability for producing high strength heavy wall thickness line pipe up to API 5L X65 and to selected API 5L X70 sizes with controlled residual stress and other criteria.

    National Pipe Companyoffers a wider choice of pipe diameters from 508 mm (20 inches) to 2134 mm (84 inches) including standard diameters, which are easily formed in Helical Pipe Mills with great accuracy, with wall thickness of 6.4 mm (0.250 inch) to 22.2 mm (0.875 inch) and from API 5L GRADE B up X70. Available lengths vary depending on specifications from a maximum length of 24 meters (80 ft.) to a minimum of 6 meters (20 ft.) as per API 5L to especially cut-to-length pipes of less than 6 meters (20 ft.) with the square cut and non-beveled pipe ends.

     
    The longer lengths have the advantages of reducing the joining costs during pipe laying. Maximum pipe lengths for export will depend on shipping availability. National Pipe Company mills can manufacture pipes with high strength and high toughness for moderate temperature service through well-controlled steel making, hot strip rolling, pipe forming and welding processes.