Standard:API 5L, API 5CT, ASTM A106/A53, ASTM A519, JIS G 3441, JIS G3444, JIS G3445 ... , X46, X56, X60, X65, X70 ASTM A53/A106: GR A, GR B, GR C ASME SA106: GR.A, GR.B, GR.C ASME SA192: SA192 ASME SA209M: T1, T1a ... ASME SA210: GR.A-1, GR.C ASME SA213: T2 ...