Established in 1998, China Guanda Hose Technology Co., Ltd. is a professional pipe bending manufacturer and wholesaler of hoses and tubes. Our annually capacity of various kinds of hoses is more than 5,000,000 meters. Our customized pipe bendings products are applied in industrial equipment, hotels, villas, toilets, and kitchens. They are widely used in the field of aerospace, metallurgy, petrol-chemical, machinery, architecture, shipping, vacuum, power and light industries.

Post-bend heat treatment
API standard facility
Destructive mechanical testing
UKAS approved laboratory
Non destructive testing
ASNT / PCN approved company
Primer, fusion bonded epoxy
Polypropylene & polyethylene coating treatments
Grit blasting. Chemical cleaning. Pickling. Pipe Bending. Passivation
Packaging and transport – both nationally and internationally by road, sea or air
Third party inspection through certified agencies.
Unison specializes in all electric pipe bending machines produced for a broad area of pipe fabricated products. We have an extensive range of electric pipe benders, pipe handling equipment and complete pipe bending integrated cells. We offer a complete electric pipe bender range which goes up to 150mm (6 inch) capacity

A pipe bend is classified according to the centerline radius (CLR) of the bend as a ratio to the nominal pipe diameter. 4 N.P.S. pipe that is bent on a 6 CLR is classified as a 1D bend or 1 times the nominal pipe diameter. When 4 N.P.S. pipe is bent on a 12 CLR, the bend is classified as a 3D bend or 3 times the nominal pipe diameter.
Close Radius Pipe Bending involves the process of providing a machine formed pipe bend made at ambient temperatures to a centerline radius of 1 times the nominal pipe size. The major reason for choosing 1D is that it is interchangeable with long radius butt weld elbows. This allows for the substitution of a pipe bend for a Long Radius 90 and 45 Butt Weld Elbow Fitting. (The centerline radius of a Long Radius 90 or 45 Elbow that is manufactured to ASME/ANSI B16.9 is also 1 times the nominal pipe size. A 4 Long Radius 90 Elbow is 6 center-to-face.)The replacement of bends for elbows will provide piping with higher integrity, faster fabrication, and lower cost. Lower costs are achieved by:Not having to procure the elbow fitting. Eliminating the welds associated with the elbow fitting.