GB/T 20933-2021Hot rolled sheet pile (English PDF)

1 Scope

This Standard specifies the order content, classification, code, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marks and quality certificate for hot rolled sheet piles.

This Standard is applicable to the hot rolled sheet piles that are used in embankment reinforcement, interception cofferdams and other anti-seepage and water-stopping projects, as well as structural foundation projects such as mud-retaining walls, water-retaining walls, and building foundation pit supports (hereinafter referred to as "hot rolled sheet piles").

2 Normative references

The following documents contain the provisions which, through reference in this Standard, become the provisions of this Standard. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this Standard.

GB/T 222, Permissible Tolerances for Chemical Composition of Steel Products

GB/T 223.3, Methods for chemical analysis of iron, steel and alloy - The diantipyryl methane phosphomolybdate gravimetric method for the determination of phosphorus content

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

GB/T 223.9, Iron steel and alloy - Determination of aluminium content - Chrome azurol S photometric method

GB/T 223.11, Iron, Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration 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 certification for section steel

GB/T 2975, Steel and steel products - Location and preparation of samples and test pieces for mechanical testing

GB/T 4336, Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)

GB/T 20066, Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition

GB/T 20123, Steel and iron - Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method)

GB/T 20125, Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method

GB/T 22368, Low-alloy steel - Determination of multi-element contents - Glow discharge optical emission spectrometry (Routine method)

YB/T 081, Rule for Rounding Off of Numerical Values and Judgement of Testing Values for Technical Standards of Metallurgy

3 Terms and definitions

There are no terms and definitions that need to be defined in this Standard.

4 Order content

The contract or order for placing orders in accordance with this Standard shall contain the following contents:

a) Reference to this Standard;

b) Product's name;

c) Designation;

d) Model;

e) Delivery length;

f) Weight and (or) quantity;

g) Other special requirements, such as: special model requirements, special surface quality requirements.

5 Classification, code

designation and model expression method

6 Technical requirements

7 Test methods

7.1 The inspection items and test methods of various inspections of steel shall meet the requirements of Table 8.

7.2 The relevant dimensions of sheet piles shall be measured as follows:

a) The effective width (W) is the distance between the center points of the two ends of the sheet pile (see Figure 1~Figure 3);

b) The effective height (H) of type U sheet pile and type Z sheet pile is the height difference from the center point of the locking notch to the surface of the web plate (see Figure 1 and Figure 2);

c) The effective height (H) of the straight sheet pile is the height difference between the joint surfaces of the two sheet piles (see Figure 3).

7.3 The chemical composition test of steel shall be carried out according to

GB/T 4336, GB/T 20123, GB/T 20125, GB/T 22368 or general chemical analysis methods. The arbitration shall adopt the methods in GB/T 223.3, GB/T 223.5, GB/T 223.9, GB/T 223.11, GB/T 223.12, GB/T 223.13, GB/T 223.14,

GB/T 223.17, GB/T 223.18, GB/T 223.19, GB/T 223.23, GB/T 223.40, GB/T 223.53, GB/T 223.54, GB/T 223.58, GB/T 223.59, GB/T 223.60, GB/T 223.61,

GB/T 223.62, GB/T 223.63, GB/T 223.64, GB/T 223.67, GB/T 223.68, GB/T 223.69, GB/T 223.71, GB/T 223.72, GB/T 223.76, GB/T 223.79, GB/T 223.85, GB/T 223.86.

7.4 Sampling shall meet the following requirements:

a) The sampling quantity of sheet piles is shown in Table 8;

b) The tensile test specimens of the sheet pile are cut at the position shown in Figure 4 along the rolling direction of the sheet pile.