... " --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 ... , India, Malaysia, Singapore, Vietnam,Thailand, Australia,Spain, Italy etc16. Certificate: API 5L,API 5CT,ISO 9001 API 5L X42 Line Pipe ERW Welded