... scaffolding system,frame ISO9001,CE certificate Safe! scaffolding pipe standards ASTM, DIN, EN, BS, JIS, used in structure scaffolding system, frameISO9001 ... , round and rectangular or square, aew according to standards ASTM A53, ASTM A106, ASTM A795, ASTM A135, ASTM A500, API 5L, API5CT, UL6, UL797, EN10219, EN10255 ...