GB/T 5836.2-2018 in English

《GB/T 5836.2-2018建筑排水用硬聚氯乙烯（PVC-U）管件》由TC48（全国塑料制品标准化技术委员会）归口，TC48SC3（全国塑料制品标准化技术委员会塑料管材、管件及阀门分会）执行，主管部门为中国轻工业联合会。

ChinaStandards.net is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.

GB/T 5836 consists of two parts:

——GB/T 5836.1-2018 Unplasticized poly(vinyl chloride) (PVC-U) pipes for soil and waste discharge inside buildings;

——GB/T 5836.2-2018 Unplasticized poly(vinyl chloride) (PVC-U) fittings for soil and waste discharge inside buildings.

This is Part 2 of GB/T 5836.

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

This part replaces GB/T 5836.2-2006 Unplasticized poly(vinyl chloride)(PVC-U) fittings for soil and waste inside buildings, with respect to which, the following main technical changes have been made:

——the material requirements are modified and the requirement for K value of resin is added (see 4.2);

——the requirement for lead limit is added (see 6.6);

——the inspection classification is added (see 8.1);

——the sampling scheme is modified, wherein, the acceptance quality limit (AQL) is improved from 6.5 to 4.0 (see 8.3.2);

——the requirements for type inspection are modified (see 8.4);

——the size groups of fittings are added (see 8.4.1);

——the properties of compounds for PVC-U fittings are added (see Annex A).

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.

This part was proposed by China National Light Industry Council.

This standard is under the jurisdiction of National Technical Committee on Plastic Products of Standardization Administration of China (SAC/TC 48).

The previous editions of this part are as follows:

——GB/T 5836-1986;

——GB/T 5836.2-1992 and GB/T 5836.2-2006.


Unplasticized poly(vinyl chloride) (PVC-U) fittings for soil and waste discharge inside buildings

1 Scope

This part of GB/T 5836 specifies the terms, definitions and symbols, materials, product classification, requirements, test methods, inspection rules, marking, transportation and storage of unplasticized poly(vinyl chloride) (PVC-U) fittings for soil and waste discharge inside buildings (hereinafter referred to as “fittings”).

This part is applicable to fittings for soil and waste discharge inside buildings which are mainly made of polyvinyl chloride (PVC) resin by injection molding. It is also applicable to fittings for industrial soil and waste discharge provided that the chemical resistance and heat resistance of the material meet the use requirements.

The fittings specified in this part shall be used with the pipes specified in GB/T 5836.1-2018.

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 1033.1-2008 Plastics - Methods for determining the density of non-cellular plastics - Part 1: Immersion method, liquid pyknometer method and titration method
GB/T 1040.2-2006 Plastics - Determination of tensile properties - Part 2: Test conditions for moulding and extrusion plastics
GB/T 1633-2000 Plastics - Thermoplastic materials - Determination of Vicat softening temperature (VST)
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 2918-1998 Plastics - Standard atmospheres for conditioning and testing
GB/T 5761-2006 Suspension polyvinyl chloride resins of general purpose
GB/T 5836.1-2018 Unplasticized poly(vinyl chloride) (PVC-U) pipes for soil and waste discharge inside buildings
GB/T 8801-2007 Test method for unplasticized polyvinyl chloride (PVC-U) fittings by falling
GB/T 8802-2001 Thermoplastics pipes and fitting - Determination of vicat softening temperature
GB/T 8803-2001 Injection-moulded unplasticized poly(vinyl chloride)(PVC-U), chlorinated poly(vinyl chloride) (PVC-C), acrylonitrile-butadiene-styrene(ABS) and acrylonitrile-styrene-acrylester (ASA) fittings - Hot oven test method
GB/T 8806-2008 Plastics piping systems - Plastics components - Determination of dimensions
GB/T 19278-2018 General terms and their definitions of thermoplastic pipes, fittings and valves
GB/T 21873-2008 Rubber seals - Joint rings for water supply drainage and sewerage pipelines - Specification for materials
GB/T 26125-2011 Electrical and electronic products - Determination of six regulated substances (lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers)
QB/T 2568-2002 Solvent cements for unplasticized poly(vinyl chloride) (PVC-U) plastic piping system

3 Terms, definitions and symbols

3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 19278-2018 and the following apply.

3.1.1
wall thickness at main body
e1
wall thickness of any point except the connecting part of fittings

3.2 Symbols

For the purposes of this document, the following symbols apply.

A length of engagement

C length of sealing zone

de outside diameter of any point

dem mean outside diameter

dn nominal outside diameter

ds nominal inside diameter of socket

dsm mean inside diameter of socket

ey wall thickness at any point

e1 wall thickness at main body

e2 wall thickness at socket

e3 wall thickness at sealing ring groove

L1 depth of socket

L2 length of spigot

R curvature radius of fitting bend

z fitting installation length (z-length)

4 Materials

4.1 The fittings shall be made of PVC-U compounds. The compounds shall mainly contain polyvinyl chloride (PVC) resin, mixed with necessary additives, which shall be evenly dispersed.

Note: see Annex A for properties of compounds.

4.2 The PVC resin shall meet the requirements of GB/T 5761-2006, and the K value shall not be less than 55.

4.3 It is allowed to use a small amount of clean rework materials produced during the manufacturing of the same products by the manufacturer.

4.4 The adhesives for connection shall meet the requirements of QB/T 2568-2002.

4.5 The elastomeric sealing rings shall meet the requirements of GB/T 21873-2008.

5 Product classification

Based on the connection forms, fittings are classified into adhesive-connected fittings and elastic-sealing-ring-connected fittings.

6 Requirements

6.1 Appearance

The inner and outer walls of fittings shall be smooth and free from bubbles, cracks, obvious streaks, dents, uneven color and discoloration decomposition lines. The fittings shall be intact and undamaged, with gates and overflow edges trimmed and smoothed.

6.2 Color

Generally, fittings are in white or gray, and may also be in other colors where determined between the supplier and the purchaser through negotiation.

6.3 Specification and size

6.3.1 Sizes of pipe sockets and spigots

6.3.1.1 Adhesive-connected fittings

The sizes of sockets and spigots for adhesive-connected fittings shall meet the requirements of Table 1; see Figure 1 for schematic diagram.

Foreword i
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Materials
5 Product classification
6 Requirements
7 Test methods
8 Inspection rules
9 Marking, transportation and storage
Annex A (Informative) Properties of compounds for PVC-U fittings
Annex B (Informative) Basic types and installation length (z-length) of fittings