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API 5L PSL2 Oil Steel Pipe Product specifications 1.Standard: API SPEC 5L, API 5CT, ASTM A53/A252, IPS, AS1163, JIS, EN10219, EN10217,GB/T 9711 etc 2.Grade: API 5L : A-X70. API 5CT: H40. J55. K55.N80; ...