ERW (Stretch reduction) pipe.

Outside diameter: min. 3” (88.9mm) max. 16” (406.4mm)

Wall thickness: min. 4mm max.12.7mm

the whole ERW pipe body is hot treated and then stretch reduction from  bigger diameter to smaller diameter. the weld seam can not be seen by eyes, and its performance is similar to seamless pipe.

Spiral Submerged Arc Welded pipe

Outside diameter: min. 8” (219.1mm) max.126” (3200mm)

Wall thickness: min. 6mm max.30mm

Steel grade: Gr. B—X80

Standard: API 5L, ASTM A53, ASTM A252, DIN1626, DIN10217 ETC.

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