Top Quality ASTM SCH 40 60 80 120 6m 12m Galvanized Round Steel Pipe Seamless

Overview

Product Description

Galvanized steel pipe is a welded steel pipe with a hot-dip or electro-galvanized layer on the surface. Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life. Galvanized pipe is widely used, in addition to the line pipe of general low-pressure fluid such as water, gas and oil, it is also used as oil well pipe, oil pipeline in the petroleum industry, especially in offshore oilfields, oil heater, condensation cooler, coal distillation oil exchanger pipe, and trestle pipe pile, mine tunnel support frame pipe, etc.

Hot-dip galvanized pipe

Hot-dip galvanized pipe is to react the molten metal with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Hot-dip galvanizing is to first pickle the steel pipe, in order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned by ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank, and then sent to the hot-dip plating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. The hot-dip galvanized steel pipe matrix undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant structure with a tight zinc-iron alloy layer. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix, so its corrosion resistance is strong.

The specific difference between carbon steel pipe and galvanized steel pipe

1. The production process is different Carbon steel pipe is made of steel ingots or solid round steel by perforation, and then made by hot rolling, cold rolling or cold drawing. The manufacturing method of the black pipe (furnace welding or electric welding) is selected by the manufacturing plant. Galvanizing adopts hot-dip galvanizing method. The uniformity of the galvanized layer The galvanized steel pipe should be tested for the uniformity of the galvanized layer. The steel pipe specimen shall not turn red (copper-plated) when impregnated 5 times in a continuous copper sulfate solution. 2. The materials used are different General carbon steel pipe: It is made of 10, 20, 30, 35, 45 and other high-quality carbon steel 16Mn, 5MnV and other low-alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steel hot rolled or cold rolled. Seamless pipes made of 10, 20 and other low carbon steel are mainly used for fluid transportation pipelines. Hot-dip galvanized pipe is to react the molten metal with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Hot-dip galvanizing is to first pickle the steel pipe, in order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned by ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank, and then sent to the hot-dip plating tank.

Specification

Hot Tags: sch 40 80 seamless galvanized steel pipe, China sch 40 80 seamless galvanized steel pipe manufacturers, suppliers, factory, prepainted coils, EN10210 Hot Dip Galvanized Oil Drilling Pipe, Sch 40 80 Seamless Galvanized Steel Pipe, ASTM A53 Gr A Hot Rolled Galvanized Steel Pipe, galvanized iron square pipe, ZAM Steel Coils Zn Al Mg