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GB/T 20933-2021: Hot rolled sheet pile Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 20933: Historical versions
Similar standardsGB/T 20933-2021: Hot rolled sheet pile---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT20933-2021GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.70 CCS H 44 Replacing GB/T 20933-2014 Hot rolled sheet pile ISSUED ON: OCTOBER 11, 2021 IMPLEMENTED ON: MAY 01, 2022 Issued by: State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 8 4 Order content ... 8 5 Classification, code, designation and model expression method ... 9 6 Technical requirements ... 10 7 Test methods ... 18 8 Inspection rules ... 20 9 Packaging, marks and quality certificate ... 21 Hot rolled sheet pile1 ScopeThis 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 referencesThe 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 Metallurgy3 Terms and definitionsThere are no terms and definitions that need to be defined in this Standard.4 Order contentThe 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 modelexpression method 5.1 Classification, code Hot rolled sheet piles include three types. The specific varieties and their codes are as follows: a) Type U sheet piles: code is PU; b) Type Z sheet piles: code is PZ; c) Straight sheet piles: code is PI. NOTE: "P" is the first letter of pile. "U", "Z", and "I" represent the cross-sectional shape of sheet piles. 5.2 Designation and model expression methods 5.2.1 Designation expression method The first letter "Q" in the designation is the initial letter of the Chinese Pinyin (Qu) of the word "Qu" that means the yield strength, and the following figure is the minimum yield strength. The last letter "P" is the initial letter of sheet pile. Example: Q295P. 5.2.2 Model expression method Type U and linear sheet piles: PU (PI) W (effective width) × H (effective height) × t (web plate thickness) Example 1: PU600×210×18 Example 2: PI500×88×11 Type Z sheet pile: PZW x (section modulus)/100 (rounded) - W (effective width) Example: PZ12-770 without edges or corners. The cleaning width shall not be less than 5 times the cleaning depth. The welding repair regulations are as follows: a) Before welding repairs, mechanical methods such as eradication or grinding with a grinding wheel shall be used to completely remove surface defects. Then carry out surfacing repair. After welding repair, grinding shall be carried out. It shall be consistent with the original rolling surface; b) There shall be no undercut and weld bead on the outer edge of welding. The height of the weld slope of the strengthened weld shall be 1.5mm higher than the original rolled surface. After cleaning the welding slope of the reinforced weld by mechanical methods such as eradication or grinding with a grinding wheel, it shall be ensured to be the same height as the original rolled surface; c) Welding repairs shall be carried out according to the steel designation using appropriate techniques; d) The depth of defect removal before welding repair shall be less than 30% of the nominal thickness of the surface to be cleaned. The weld repair area shall be less than 2% of the sheet pile inspection area. 6.7 Numerical rounding Numerical rounding shall comply with YB/T 081.7 Test methods7.1 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. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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