... 5CT/5L, J55, N80, manufacture of seamless steel pipe for coupling stock.coupling stock: Grade: A25, A42, B42 ... ,X42,X46,X52 seamless steel pipe for coupling stock Typeseamless steel pipe for coupling stockBrand NameTMSSPStandardAPI 5CT/5LGradeA25, A42 ... tonsProductivity200MT/DayPlace of OriginChinaPaymentT/T; L/CDelivery TimeAccording to customer's requirementOthers1. General diameter pipe: 10~140mm ...