What is the steel pipe coating technology?

Our company has two sets of the most advanced AGC 500 four-roll rolling mill, two sets of 450 six-roller reversing mills, two sets of 650 reversible rolling mills, one set of 600-straightening machines, one set of 650 flat machines, and six sets of galvanizing production lines. The production is fully capable of producing high quality gi pipe products for customers. So what do you know about steel tube coating technology? Where is the main application? Don’t worry, listen to us slowly.
The inner and outer walls of the pressure steel pipe are sprayed and rusted by a steel abrasive and a steel wire mixed abrasive. The inner wall surface of the steel pipe is sprayed with epoxy paint. The derusting grade meets the grade specified in GB8923-88. The outer wall of the buried pipe is sprayed with cement slurry. The derusting grade should reach Sa1 grade; the surface roughness after pretreatment should reach: conventional paint 40~ 70μm; thick slurry heavy coating 60~100μm; the inner wall surface of the pressure steel pipe is coated with self-supporting primer and topcoat, and the dry paint film thickness is 500μm. The outer wall of the steel pipe is evenly coated with a cement mortar with corrosion inhibitor; In the range of 200mm on both sides of the seam, after the surface is pretreated, the shop primer will not affect the welding quality; after the ring seam is welded, the second derusting is carried out, and the paint is applied by manual brushing or small high pressure painting machine.

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