Steel-plastic composite pipe

Galvanized welded pipe
No.: Steel Plastic Composite Pipe
Model: Complete

Galvanized welded pipe In order to improve the corrosion resistance of steel pipe, galvanized general steel pipe is carried out. Galvanized welded pipe is divided into hot galvanizing and cold galvanizing.
Introduction and application
In order to improve the corrosion resistance of steel pipes, galvanized steel pipes are used. Galvanized steel pipe is divided into hot-dip galvanizing and electrolytic zinc plating. Oxygen blowing welded pipe: used for steel blowing oxygen pipe, generally with small diameter welded steel pipe, specifications from 3 / 8-2 inch eight. Made of steel strips of 08, 10, 15, 20 or 195-Q235, in order to prevent corrosion, it is necessary to carry out aluminizing treatment.
Most of the old houses are galvanized pipes, gas, Heating with the kind of iron pipe is also galvanized pipe, galvanized pipe as a water pipe, the use of a few years later, the pipe produces a large number of rust, the outflow of yellow water not only pollutes the sanitary ware, but also mixed with non-smooth inner wall breeding bacteria, corrosion caused by heavy metal content in the water is too high, serious harm to human health. In the 1960s and 1970s, developed countries in the world began to develop new types of pipes and successively banned galvanized pipes. China's Ministry of Construction and other four ministries and commissions also issued a document from 2000 onwards banned galvanized pipe, after 2000, the new residential cold water pipe has rarely used galvanized pipe, some residential hot water pipe is used galvanized pipe.

Weight coefficient
Nominal wall thickness mm 2.0 2.5 2.8 3.2 3.5 3.8 4.0 4.5
Coefficient c 1.064 1.051 1.045 1.040 1.036 1.034 1.032 1.028
Mechanical properties of steel injection is an important index to ensure the final use performance (mechanical properties) of steel, which depends on the chemical composition and heat treatment system of steel. In the steel pipe standard, according to different requirements, the tensile properties (tensile strength, yield strength or yield point, elongation) and hardness, toughness indicators, as well as the high and low temperature properties required by the user are specified. : Grade of steel: Q215A; Q215B; Q235A; Q235B
Test pressure value / Mpa: D10.2-168.3mm is 3 Mpa; D177.8-323.9mm for 5 Mpa
Classification of galvanized steel pipe: galvanized steel pipe cold plating pipe, hot plating pipe, the former has been banned, the latter is also advocated by the state can be used temporarily.

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