Hangzhou Oxygen Plant Group Co., Ltd. engages in the manufacturing and sale of air separation equipment, petrochemical equipment, and industrial gases. Its products include air separation equipment & units, ethylene cold boxes, liquid nitrogen washing cold boxes, propane dehydrogenation units, natural gas liquefaction units, oxygen, nitrogen, argon, neon, helium, krypton, xenon, high purity oxygen, high purity nitrogen, carbon dioxide, and mixed gases. The company was founded in 1950 and is headquartered in Hangzhou, China.