Precision pipe could be made by the carbon,alloy or stainless steel with high precision sizes,manufacturing by hot rolling or cold drawn(cold rolling) processes.It’s commonly used in manufacturing precision machinery parts and engineering structure.

Precision steel pipes finished in Haihao Group

Precision pipe manufacturing process flow chart:

Steel bar-physical and chemical inspection-surface treatment-cutting-heating-hot piercing-shell storage-Pickling and lubrication-cold rolling-heat treatment-Pickling and lubrication-cutting-punching-cold drawn-size inspection-out and inner surface cleaning-NBK&GBK-mechanics inspection-chemical inspection-straightening-trim-polishing -high pressure oil blowing-eddy current testing-anti rust oil painting-print-packing-finished storage-delivery with quality certificate.

Haihao Group has advanced manufacturing process,technology and equipment along with perfect testing facilities. Our factory has the ability to supply 1.2 million tons seamless products with OD from1/8″ inch to 24inch with the wall thickness 1.73mm to 60 mm.If you have an interest in flange,steel pipe and pipe fittings,free to contact us,email:sales@haihaogroup.com