... platens, measured under load is not greater than 75% of the OD of tube.b)For Material :Distance Between the platens, measured ... under load is not greater than 60% of the OD of tube.STRAIGHTNESS:1 in 500 (In 1 meter it ... lower liquid transportation, such as water, oil, gas,…etc.:b)Fabrication of steel manufacture, Greenhouse, Scaffolding tube, Furniture making,Fencing.PLACE ...