... 50mm3. Length:3m-12m4. Producing Standard:American ASME B36.10M, ASTM, API 5L, API 5CT Japanese JISGerman DINChinese GBBS standard5. ... Main Material:(Carbon Steel & Low Alloy steel)ASTM A53, A106, A210, A252, A333 etc; X42, X46, X52, ... products are listed below for your reference.12. Chemical composition:Please See below. Process of Seamless Steel Pipe Lonrise Group with ...