... .B X42~X80 AWWA C200 ASTM A36/A53/A500 heat pipe Production SSAW Steel Pipe / Spiral Seam double-side submerged arc welded steel ... .8m-20m,or as customer’s requirements. Place of Origin China Main Market Middle East,Africa,South-east Asia,USA,Canada ... ,South America Technique SAW welding UsagePiling projectheat-supply project 3. conveying drinking water,drainage,coal gas,fuel gas ...