Composite hose elongates as the materials used are not vulcanized together by heat treatment. US Hose composite hoses are manufactured from tightly wound thermoplastic fabrics and films wound around a pressure stabilized inner wire helix. All materials are reinforced with an outer wire helix. All these materials working together provide an exceptionally strong and durable flexible transfer hose with a superior service life.
Our standard oil and chemical hoses are rated for 212 degrees Fahrenheit, depending on media, pressure and handling. Whereas our range of cryogenic hose is suitable for as cold as Liquified Natural Gas. For more specific information, please contact the US Hose Product Management or Engineering Department.
With the wide range of hoses we manufacture ranging from vapor recovery to cryogenic service, pressure is dependent on size and service condition. Generally speaking, our standard oil and chemical hoses are rated between 200 to 250 psi with a minimum 4 to 1 safety factor and our cryogenic hose is rated up to 350 psi with a 5:1 safety factor. For more specific information, please contact the US Hose Product Management or Engineering Department.
Fluoropolymer is a fluorocarbon based polymer with multiple strong carbon–fluorine bonds. Fluoropolymers are known for their extreme chemical resistance as well as a higher heat range than other plastics. In addition fluoropolymer does not seem to decompose the way other plastics and synthetic rubbers do, although no shelf life has yet been determined for fluoropolymer. Some fluoropolymer items have been in service for over 30 years without any signs of deterioration. A few of the most common formulations are PTFE a.k.a. polytetrafluoroethylene, PFA a.k.a. perfluoroalkoxyl and FEP a.k.a. Fluorinated Ethylene Propylene.
In the end, the most important factor is whether or not the finished assembly performs to the accepted industry standards. Both methods are used successfully when fabricating qualified aerospace and industrial assemblies. However there are several advantages to the crimping, lower tooling costs, ease of assembly, faster production rate, scrap reduction, etc. Therefore crimping is the more widely used.
Dash size is common terminology used to refer to the inner diameter of a hose. This was a system developed to identify the hose size in a part number. A two digit number is used to represent the relative I.D. in sixteenths of an inch. However, dash sizes do not match to the actual inner dimension of the hose. The actual I.D. is smaller. For example, -04 hose has an actual I.D. of .187, -05 hose has an actual I.D. of .250. If the exact inner dimension is required be sure to ask for true bore hose size.
This can cause some confusion but when in doubt contact our customer service department and we will be happy to assist you in making the proper choice.