... scaffolding system,frame ISO9001,CE certificate Safe! scaffolding pipe standards ASTM, DIN, EN, BS, JIS, used in structure scaffolding system, frameISO9001 ... 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 ...