A protective coating on the carbon pipe.to weld it you must grind it until you see sparks coming off.thats when you know you have gotten the coating off,then you can weld it easier.but it is cheap material pipe.low pressure.
Pipe Lining refers to the internal diameter, pipe coating is external.
NO!! Black iron pipe has a special coating to resist the highly corrosive effect of natural gas. Galvenized pipe CANNOT be used for gas service.
No the moron politicians have no clue to what they are talking about. Lead water lines for example get a protective coating (oxidization) that prevents the actual lead from entering the potable water supply over time.
some use paint and some use a clear polyurethane or Epoxy. I will assure that any Home Depot or lowes paint department head is well versed in the best options for this question.
Extra heavy soil pipe (CI) requires NO Coating
A protective coating on the carbon pipe.to weld it you must grind it until you see sparks coming off.thats when you know you have gotten the coating off,then you can weld it easier.but it is cheap material pipe.low pressure.
Pipe Lining refers to the internal diameter, pipe coating is external.
PVC Pipe do not require any preventive-coating like primer or black-japan etc. In fact any coating must be cleaned from the joints before joining the pipes. PVC pipes (PVC or uPVC or cPVC or PPR) are self protective.
Galvanization usually refers to a thin coating of zinc applied mechanically or (usually) electrolytically to steel or cast iron pipework, as a protective coating against rust. Iron and steel (an alloy of iron with carbon and other materials) are ferrous. Overall galvanized pipework is ferrous. The zinc coating is not. Similarly, any coating of paint or rubber doesn't alter the underlying ferrous nature of iron pipe.
the answer is mucus
yes
Nickel
Before they moult it, the protective coating of arthropods is referred to as the exoskeleton. The pieces of moulted exoskeleton after removal are called exuviae.
the protective protein coating
the cell wall
Carbon