... to 30 inch.W.T max 50MM Specificationscarbon steel pipe 1)seamless steel pipe with API 5L PSL1 and PSL2 2)ASTM ... .Our company's production is carried out in accordance with TS EN ISO 9001:2000, API5 L, ISO 14001:2004 and ... also realized in accordance with the international standards such as TS, DIN, AWWA, ASTM, BS, UNI, JIS, GOST, ANSI, ISO.The ...