Temperature range: -20 C ~121 C. Inner layer: oil resistant, acid resistant, alkali resistant and abrasion resistant butyl rubber. Reinforcement layer: single high strength steel wire and 2-8 layer winding structure. Outer layer: chloroprene rubber which is oil resistant, wear resistant and weather resistant. Outer protective layer: stainless steel armour. Joint type: it can provide welding or integral connection form of nonunion, flange or clamp, and can also be manufactured according to user’s requirements. Execution standard: API Spec 16C