Patent ID: 8497005

Claim:
A method comprising producing or obtaining an abrasive particulate stream or abrasive slurry stream; flowing the abrasive particulate stream or abrasive slurry stream into one end of a metal pipe; receiving the abrasive particulate stream or abrasive slurry stream out of the other end of the metal pipe wherein the metal of the metal pipe is made of steel, aluminum, or copper, or alloys of two or more thereof; the metal pipe comprises an inner layer, which is a film or sheet; the inner layer comprises or is produced from a grafted polyolefin; the film or sheet has a thickness of about 0.001 to about 102 mm and comprises the grafted polyolefin; the grafted polyolefin is produced by grafting a parent polyolefin with an α,β-ethylenically unsaturated carboxylic acid or anhydride; the parent polyolefin comprises repeat units derived from ethylene and a C 3-20 α-olefin, has a density of about 0.9 g/cc (ASTM D-792) or less; and the parent polyolefin has a Shore A hardness of about 96 or less (ASTM D2240, ISO 868).