Overview

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Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. Complicated physical and chemical reactions occur between the steel pipe matrix and the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a compact structure. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix. Therefore, its corrosion resistance is strong.

Need to note that the 1960s and 1970s, developed countries in the world began to develop new types of pipes and gradually banned galvanized pipes. Four ministries and commissions including the Ministry of Construction of China also issued a document clarifying that galvanized pipes have been banned from 2000 onwards. Galvanized pipes are rarely used for cold water pipes in newly built communities, and galvanized pipes are used for hot water pipes in some communities.

Application

It Is Mainly Used for force and pressure parts, and for general purpose steam, water, gas and air pipes.

Main Grade

GR.A, GR.B

Chemical Component

A The sum of these five elements must not be greater than 1.00%。

B For every 0.01% decrease in the maximum carbon content, the maximum manganese content is allowed to increase by 0.06%, but the maximum cannot exceed 1.35%.

C Each 0.01% decrease in the maximum carbon content will allow the maximum manganese content to increase by 0.06%, but the maximum must not exceed 1.65%.

Mechanical Property

A The minimum elongation of gauge length 2in. (50mm) shall be determined by the following formula：

e=625000(1940)A^0.2/U^0.9

e = the minimum elongation of the gauge 2in. (50mm), the percentage rounded to the nearest 0.5%;

A = Calculated according to the specified outer diameter of the nominal tube or the nominal width of the tensile sample and its specified wall thickness, and rounded to the nearest cross-sectional area of the tensile sample of 0.01 in.2 (1 mm2), and It is compared with 0.75in.2 (500mm2), whichever is smaller.

U = specified minimum tensile strength, psi (MPa).

B For various combinations of different sizes of tensile test specimens and prescribed minimum tensile strength, the required minimum elongation is shown in Table X4.1 or Table X4.2, according to its applicability.

Test Requirement

Tensile test, bending test, hydrostatic test, nondestructive electrical test of welds.

Supply Ability

Supply Ability: 2000 Tons Per Month Per Grade Of ASTM A53/A53M-2012 Steel Pipe

Packaging

In Bundles And In Strong Wooden Box

Delivery

7-14 days if in stock, 30-45 days to produce

Payment

30% depsoit, 70% L/C or B/L copy   or  100% L/C at sight

Product Detail

Boiler Tube

GB/T 8162-2008

ASTM A519-2006

BS EN10210-1-2006

ASTM A53/A53M-2012

GB9948-2006

GB6479-2013

GB/T 17396-2009