... 18" 4).WT: 4-- 16mm 1. Commmodity Name : API 5L X42 Line Pipe ERW Welded2. Type :ERW Welded3. ... Standard: EN10217.1, EN10219.1,API 5L ,ASTM A53,GB/T3091,GB/T9711,etc4. Grade ... X52, X56, X60, X70, X80,etc5. OD : 4" --18"6. WT: 4-- 16mm7. Schedule : SCH 40 / 80 / 160 / ... , Vietnam,Thailand, Australia,Spain, Italy etc16. Certificate: API 5L,API 5CT,ISO 9001 API 5L X42 Line Pipe ERW Welded