supply of 200 mm dia flexible hose and storz coupling for dewatering pump at r.b. airport, bhopal. sh- misc. electrical works. supply of 200 mm dia flexible hose and storz coupling for dewatering pump at r.b. airport, bhopal. sh- misc. electrical works. , supply of heavy duty polyurethane ( pu ) covered hose pyrofrac hose pipe made of high tenacity. synthetic yarn circular woven totally embedded in the pu compound with necessary protection against mechanical damage & homogenous construction without use of any adhesives / glues with abrasion resistance > 15000 cycle, operating temperature range is -50 °c and 80 °c, chemical resistance properties: exposure to seawater and contamination by most chemical substances, hydrocarbons, oils, alkalis, acids and greases must have no effect on the short or long term performance of the hose, static pressure withhold limit / heat resistance the hose when subjected to a static pressure of 100 psi ( 700 kpa ) shall be capable of withstanding a surface temperature of 650 °c for a minimum of two minutes without rupture or damage to the synthetic reinforcement, elongation rate is less than 0.5 % at 150 psi dia. 200mm working pressure 14kg / cm², burst pressure 42kg / cm² , supply of dully fitted with storz couplings made of aluminum alloy, size: 200mm x 200mm, pair of male & female parts complete etc. as required.