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Standard
Our products are strictly in conformity with ASTM, DIN, JIS, GB standards
http://www.vinssco.com/down/DIN_EN_ISO_1127.pdf
http://www.vinssco.com/down/DIN17458.pdf
http://www.vinssco.com/down/ASTM_A269-04一般设备用无缝和焊接奥氏体不锈钢管(英文).pdf
http://www.vinssco.com/down/ASTM_A240-2006.pdf