GB/T 38215-2019Hot rolled steel strip for structural corrugated steel pipe (English PDF)

1 Scope

This Standard specifies designation representation method, order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marks and quality certificate of hot rolled steel strip for structural corrugated steel pipe.

This Standard is applicable to the hot rolled steel strip for structural corrugated steel pipe that is necessary to have certain bearing requirements for the production of bridges, culverts, tunnels, underground infrastructure, water supply and drainage, water storage facilities, that the thickness is not greater than 16mm (hereinafter referred to as the steel strip).

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 222, Permissible tolerances for chemical composition of steel products

GB/T 223.5, Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method

GB/T 223.12, Methods for chemical analysis of iron, steel and alloy - The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content

GB/T 223.19, Methods for chemical analysis of iron, steel and alloy. The neocuproine-chloroform extraction photometric method for the determination of copper content

GB/T 223.23, Iron, Steel and Alloy-Determination of Nickel Content - The Dimethylglyoxime Spectrophotometric Method

GB/T 223.40, Iron, Steel and Alloy - Determination of Niobium Content by the Sulphochlorophenol S Spectrophotometric Method

3 Designation representation method

A steel designation consists of three parts: "Q" that is the initial for Chinese pinyin "Qu" (yield strength), the specified minimum yield strength value and "BW" that is the initials for Chinese pinyin "Bo Wen" (corrugated) that represents usage.

For example: Q235BW Where, Q - the initial for Chinese pinyin "Qu" (yield strength of steel);

235 - the specified minimum yield strength value, in megapascals (MPa);

BW - the initials for Chinese pinyin "Bo Wen" (corrugated) that represents usage.

4 Order content

4.1 The contract and order sheet according to this Standard shall contain the following information:

a) reference to this Standard;

b) product name;

c) designation;

d) size and unevenness accuracy;

e) weight;

f) roll diameter;

g) packaging method;

h) edge state;

i) other special requirements.

4.2 If the order contract does not specify the information such as the edge state, thickness accuracy, packaging method, it shall be supplied in the form of non-cutting, normal thickness accuracy and packaging provided by the supplier. […]