scaffolding pipe standard ASTM, DIN, EN, BS, JIS, used in structure scaffolding system,frame ISO9001,CE ... certificate Safe! scaffolding pipe standards ASTM, DIN, EN, BS, JIS, used in structure scaffolding system, frameISO9001, CE ... ASTM A53, ASTM A106, ASTM A795, ASTM A135, ASTM A500, API 5L, API5CT, UL6, UL797, EN10219, EN10255, EN10240, EN39(BS1139), DIN2440/DIN2444 ...