... A252 Gr.2,A36,A500,A139,A53 API5LGr.B~X80 Water Pipe Line Production SSAW Steel Pipe/ Spiral Seam double-side ... Technique SAW welding UsagePiling projectheat-supply project 3. conveying drinking water,drainage,coal gas,fuel gas,mine slurry and other low ... natural gas pipeline 5. Chemistry industry 6. Electric power engineering circulating pipe Package1.Bundle packing or in bulk,2. Bevelled or ...