Pressure metal hoses – general information
Flexible metal hoses are manufactured of corrugated sheet metal made of austenitic stainless steel (AISI 321, AISI 316L) in a process of mechanical forming or hydroforming. Used in high temperature conditions – even up to several hundred degrees (hot water, steam, oil, high ambient temperatures), for low temperatures (cryogenic gases), for technical gases (e.g. oxygen, argon, helium) and many other chemical substances.
The working pressure ranges up to several hundred bar depending on hose type, diameter and temperature. Suitable for cyclic bending conditions under pressure (service life of 50000 cycles confirmed in accordance with ISO 10380 standard conditions).
There are version with AISI 304 stainless steel braid, without braid or with double braid, nominal diameters ranging from DN6 up to DN250.
Used as complete hose assemblies with carbon steel or stainless steel fittings welded to the hose. The highest quality of steel hoses and hose assemblies welded in Tubes International is confirmed with certificates issued by Germanischer Lloyd, Det Norske Veritas and Office of Technical Inspection (UDT) within the scope of compliance with Pressure Equipment Directive 97/23/EC.
Flexible metal hose assemblies with fittings
Ready for use, complete hose assemblies made out of metal pressure hoses with welded fittings (made of carbon steel, 304 and 316/316L stainless steel). Hose assemblies with standard threaded fittings, flange, pipe and other fittings. With BSP, BSPT, NPT pipe thread, metric thread and UNF imperial thread. Fixed or swivel flanges according to PN-EN 1092-1 (DIN PN), also flanges according to ANSI B 16.5 American standard . Special fittings are produced to customer order always as fast as possible. The hose assemblies with soldered brass fittings are also available.
The fittings are welded by our certified welders in the atmosphere of shielding gas, under controlled production conditions. The highest quality of steel hoses and hose assemblies welded in Tubes International is confirmed with certificates issued by Germanischer Lloyd, Det Norske Veritas and Office of Technical Inspection (UDT) within the scope of compliance with Pressure Directive 97/23/EC.
There is also a group of flexible steel hoses assemblies heated with e.g. steam, with double-jacket design (see heated hoses group).
When a steel hose assembly is selected, besides working pressure, temperature and chemical resistance, also remember about the conditions required to connect the hose assembly to the installation, especially about the length, position, minimum bending radius – particularly if the installation moves. It is recommended to prepare a dimensional sketch of the installation.