Helical Pipe Mill

High Grade and High Quality Helical Seam SAW Pipes (Spiral Pipes)

NPC 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 X70 with controlled residual stress, outstanding dimensional accuracy and other criteria.

NPC offers a wider choice of pipe diameters from 20”-84” (508-2134mm) including standard diameters, which are easily formed in Helical Pipe Mills with great accuracy, with wall thickness from 0.250” - 0.875” (6.4 - 22.2 mm) and from API 5L GRADE B up X70. Available lengths vary depending on specifications from a maximum length of 80 feet (24 meters) to a minimum of 20 feet (6 meters) as per API 5L to especially cut-to-length pipes less than 20feet (6 meters) with square cut and non-bevelled pipe ends. Longer lengths have the advantages of reducing the jointing costs during pipe laying. Maximum pipe lengths for export will depend on shipping availability. NPC 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.

LPM Process Flow Diagram