... CE, ISO9001, ISO14001, ISO18001, OHSAS1800Experiment bases for welding education of Xi’an Jiaotong University (XJTU).Specifications: ... ’ requirements.Lubrication: Grease lubricationWelding: carbon dioxide arc welding,argonarcwelding,electrode welding etc.; in accordance with AWS standard or ... substitute welding standardLagging: Cold lagging; hot vulcanized lagging, ...