Testing and inspection.
See the testing methods and markings used to identify Supreme pipes.
Explore testing and inspectionERW pipe manufacturing process.
Explore ERW pipe production and the six stages of Supreme’s galvanizing process, from preparing the steel surface to removing excess zinc.
How ERW pipe is made.
ERW stands for electric resistance welding. Steel sheet is formed into a tube, and electrical current and pressure join its edges without welding filler. The pipe is then sized and cut.
Read about ERW production
The diagram shows tube making and cold drawing. Ask Supreme which stages apply to the pipe you need.
View full-size production diagramThe galvanizing process.
Supreme’s blowing system covers six stages, from surface preparation and dipping in molten zinc to removing excess zinc.
Metal preparation
Pipes undergo pickling, degreasing and zinc fluxing before dipping.
Pre-dipping phase
The preparation stage before pipes enter the zinc bath.
Dipping
Pipes are immersed in a bath of molten zinc.
Auto pick-up system
The handling stage after dipping.
Air wipe system
Air wiping spreads the zinc coating across the pipe surface.
Steam blowing system
Steam blowing removes excess zinc.
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