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GB/T 33281-2016Welded wire fabric coated with zine (English PDF)

镀锌电焊网

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 13, 2016

Implementation date

July 1, 2017

Scope

GB/T 33281-2016 is the English-translated version of 镀锌电焊网.

GB/T 33281-2016 is the Chinese standard "Welded wire fabric coated with zine". Its scope clause reads: This standard specifies the marking, type and size, requirements, test methods, inspection rules, marking, packaging, transportation and storage of welded wire fabric coated with zine (hereinafter referred to as welded wire fabric).

This standard applies to welded wire fabric used in construction, planting, breeding, machine protection covers, fences, poultry cages, egg baskets, transportation, mining and other purposes.

Its clauses include marking; types and dimensions; requirements; test method; inspection rules; marking, packaging, transportation, storage. It was issued by the General Administration of Quality Supervision, Inspection and Quarantine on DECEMBER 13, 2016 and took effect on JULY 01, 2017.

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Document preview — GB/T 33281-2016

National Standard of the People's Republic of China

ICS: 77.140.99
Classification: Y 72

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword3
1 Scope4
2 Normative references4
3 Marking4
4 Types and dimensions5
5 Requirements6
6 Test method9
7 Inspection rules11
8 Marking, packaging, transportation, storage12

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard specifies the marking, type and size, requirements, test methods, inspection rules, marking, packaging, transportation and storage of welded wire fabric coated with zine (hereinafter referred to as welded wire fabric).

This standard applies to welded wire fabric used in construction, planting, breeding, machine protection covers, fences, poultry cages, egg baskets, transportation, mining and other purposes.

2 Normative references

The following documents are essential to the application of this document. 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 1839-2008 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products

GB/T 2828.1 Sampling procedures for inspection by attributes -- Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection

GB/T 2829 Sampling procedures and tables for periodic inspection by attributes (apply to inspection of process stability)

GB/T 2972 Test method for uniformity of zinc coating on zinc-coated steel wire by the copper sulphate dip

YB/T 5294 Low carbon steel wire for general uses

3 Marking

3.1 Product marking

Welded wire fabric coated with zine Wire diameter × Warp mesh length × Weft mesh length color shall be consistent; there shall be no defects of exposed iron.

5 Requirements

5.8.2 The number of zinc particles on the welded mesh surface shall not exceed 5% of the number of mesh apertures; the maximum zinc particles shall not exceed 10% of the wire diameter.

5.9 Surface coating

5.9.1 The mass of the zinc coating of the welded mesh shall be greater than 140 g/m².

5.9.2 The zinc coating shall be uniform; the number of copper sulfate immersion tests shall be no less than two. The immersion time for wires with a diameter greater than 1 mm is 60 s; the immersion time for wires with a diameter less than 1 mm is 30 s.

5.10 Rolling rate

The welded mesh is allowed to be assembled from two segments. The length of the shorter segment shall not be less than 5 m; each roll of the welded mesh shall be at least 300 mm longer; the rolling rate shall not exceed 5%.

6 Test method

6.1 Materials

The supplier shall provide a quality guarantee. In case of dispute, the relevant standards shall be used for testing.

6.2 Size, mesh deviation, rolling rate of welded mesh

6.2.1 Length and width of welded mesh: Unfold the mesh on a flat surface and measure with a steel tape measure which has a reading of 1 mm.

6.2.2 Mesh deviation: Unfold the mesh on a flat surface and measure the number of mesh holes within 305 mm (see Table 5) with a steel ruler which has a reading of 1 mm.

In case of dispute, a vernier caliper with a reading of 0.02 mm may be used for measurement.

6.2.3 Wire diameter: Use a micrometer with a reading of 0.01 mm to measure 3 warp and weft wires (except for zinc particles) at random; take the average value.

6.2.4 Length of exposed mesh edge: Use a vernier caliper with a reading of 0.02 mm to […]

6.7 Appearance

6.7.1 Visual inspection is used to inspect the flatness of the welded mesh surface, mesh uniformity, color, and exposed iron defects.

6.7.2 Take any length of 1 m on the mesh surface; measure it with a vernier caliper with a reading of 0.02 mm. Take the difference between the measured value and the wire diameter; conduct zinc particle detection (see 5.8.2).

6.8 Surface coating

6.8.1 The quality of the zinc coating shall be tested in accordance with the relevant provisions of GB/T 1839-2008.

6.8.2 The copper sulfate test of the zinc coating shall be carried out in accordance with the relevant provisions of GB/T 2972.

7 Inspection rules

7.1 Product inspection is divided into exit-factory inspection and type inspection.

7.2 Products must be accepted by the inspection department of the manufacturer before they can be shipped. The recipient has the right to re-inspect the delivery batch. Exit-factory inspection shall be carried out in accordance with the provisions of GB/T 2828.1, using the special inspection level S-1 and five-time sampling plan.

Exit-factory inspection items, unqualified categories, acceptance quality level (AQL) shall be as specified in Table 6.

7.3 Type inspection shall be carried out in accordance with the provisions of GB/T 2829, using the discrimination level III and one-time sampling plan.

In one of the following situations, type inspection shall be carried out: […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

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