GB/T 19812.3-2017Plastic equipment for water saving irrigation—Part 3: Drip pipe and drip tape inlaid with emitters inside (English PDF)

Foreword

GB/T 19812 "plastic water-saving irrigation equipment" is divided into five parts.

--- Part 1. Single-wing labyrinth drip tape;

--- Part 2. Pressure compensated dripper and drip irrigation pipe;

--- Part 3. Inlaid drip irrigation and drip tape;

--- Part 4. Polyethylene (PE) branch pipe;

--- Part 5. Buried drip pipe.

This section GB/T 19812 Part 3.

This section drafted in accordance with GB/T 1.1-2009 given rules.

This Part replaces GB/T 19812.3-2008 "plastic water-saving irrigation equipment inlaid drip irrigation pipe, with" and GB/T 19812.3-2008 compared to the main technical changes other than editorial changes are as follows.

--- The standard name was changed to "plastic water-saving irrigation equipment Part 3. Inlaid drip irrigation and drip tape";

--- Removed the "paragraph" in the last paragraph "This section does not apply to the use of buried irrigation pipe, with" (see Chapter 1, 2008 edition 1 chapter);

--- Normative references added GB/T 2918-1998, GB/T 8804.3-2003, GB/T 16422.2-2014, GB/T 19278-2003, GB/T 19466.6-2009, SL571-2013 (see Chapter 2);

--- Removed the term "flow index", adding "rated working pressure" "nominal wall thickness" "nominal diameter" of the definition (see Chapter 3, 2008 edition Chapter 3);

--- "Marking" chapter added "wall thickness" of the marking requirements "Specifications. Pipe diameter (mm) × nominal wall thickness (mm) × Drip hole spacing (mm) "(see Chapter 4, 2008 Edition, Chapter 5);

--- "Material" chapter, an increase of "manufacture of drip irrigation pipe, drip irrigation tape used should be polyethylene" "should not use medical waste and have Recycled materials from toxic and hazardous chemical packaging "" Made according to this section Polyethylene drip irrigation tubes or polyethylene drip tapes Used raw materials can be added to recover from the field according to this part of the production of polyethylene drip tape made of recycled material, the performance should be Fu For the requirements of this part, see Appendix A "and other requirements (see Chapter 5, 2008 edition Chapter 6);

--- Deleted two kinds of pressure rating of "250kPa" and "320kPa" (see 6.3.1, 2008 edition 7.2.1) in the specification of drip irrigation pipe;

--- Remove the "drip irrigation with nominal wall thickness and its limit deviation" requirements "0.50mm" "0.60mm" two specifications (see 6.3.2.2, 2008 edition 7.2.2.2);

--- Modify "C" value and "Cv" value in "Flow Uniformity" requirement, "C" is changed to "Average flow q relative to rated flow qn (C) should be within ± 7%. "" Cv "should be amended to read" not to exceed 7% "(see 6.4, 2008 version 7.3);

--- Modify "the relationship between flow and inlet pressure" in the "Rq", revised to "the average flow curve of the flow rate relative to The deviation (Rq value) of the flow rate obtained from the plant curve should be within ± 7%. "(See 6.5, 2008 edition 7.4);

--- Increase the "anti-sediment blocking performance requirements" (see 6.6);

--- Modify the "pressure resistance" at 23 °C and change to "non-reusing drip tape should be able to withstand 1.5 times the rated working pressure;" "Reusable Drip pipe, drip tape should be able to withstand 2 times the rated working pressure "" Flow rate deviation should be within ± 7%. " (See 6.7.1, 2008 edition 7.5.1);

--- Modify the "water pressure at 45 °C", the test temperature is modified to "(45 ± 2) °C"; the maintenance time is changed to "and maintain 1h"; flow The amount of deviation is revised to read "Flow rate deviation should be within ± 7%" (see 7.6.2, 2008 version 7.5.2);

--- Increased non-multiplex drip tape "burst pressure" requirements and test methods (see 6.8,8.8);

--- Modify the "pull-pull performance" in the load, revised to "should be able to withstand the required load" (see 6.9, 2008 version 7.6);

--- Increasing the reuse of drip irrigation, drip irrigation with "artificial aging performance" requirements (see 6.10);

--- Modify the "carbon black content" index value, revised to "(2.25 ± 0.50)%" (see 6.1.8.2008 edition 7.9);

--- Increase the sample conditioning requirements, "Unless otherwise specified, the sample at an ambient temperature of (23 ± 2) °C under the conditions adjusted to Less 24h. "(See 7.2);

--- Modify the "flow and the relationship between the inlet pressure" test method (see 8.5, 2008 8.5);

--- Increase "anti-sediment clogging performance" test method (see 8.6);

--- pull-resistant performance test method to increase Table 7, the test load is loaded by the nominal wall thickness of the product were classified (See 8.9);

--- Increasing the "artificial aging performance" test method (see 8.10);

--- Modify the "batch" program, revised to "each batch of 5,000 volumes"; seven days production was revised to "less than 5,000 volumes" (see 9.1, 2008 Edition 9.1);

--- Added "batch number N and sample size n" in Sampling Plan (see 9.2.2);

--- Modify the "type test" period, revised to "two years" (see 9.3, 2008 version 9.3);

--- Increasing the "type test" decision rules (see 9.4.2);

--- Added an informative appendix "Polyethylene recycling materials performance" (see Appendix A).

1 Scope

This section GB/T 19812 specifies the terms and definitions, markings, materials, requirements, samples and tests of inlaid drip irrigation and drip irrigation tape Conditions, test methods, inspection rules and packaging signs, packaging, transportation, storage.

This section applies to the main material using polyolefin as the main raw material inlay non-pressure compensation drip irrigation pipe and drip tape (hereinafter referred to as "drops Irrigation "or" drip tape "), the transmission medium temperature does not exceed 45 °C.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 2828.1-2012 Sampling procedures for inspection - Part 1 - Batch-by-lot inspection by acceptance quality limit (AQL) plan

GB/T 2918-1998 plastic sample conditioning and testing of the standard environment

GB/T 8804.3-2003 Determination of tensile properties of thermoplastic pipe - Part 3 Polyolefin pipes

Plastics piping systems - Determination of dimensions of plastic parts

GB/T 13021-1991 Polyethylene pipe and fittings - Determination of carbon black content (TG method)

GB/T 15819-2006 Irrigation polyethylene (PE) pipe by the plug-in pipe caused by environmental stress cracking resistance test side Law and technical requirements

GB/T 16422.2-2014 Plastics - Laboratory exposure test methods - Part 2: Xenon arc lamps

Technical specifications and test methods for drippers and drip irrigation pipes for agricultural irrigation equipment GB/T 17187-2009

GB/T 18251-2000 Polyolefin pipes, fittings and mixed materials Determination of pigment or carbon black dispersion

Thermoplastics pipes, fittings and valves - Generic terminology and their definitions GB/T 19278-2003

GB/T 19466.6-2009 plastic differential scanning calorimetry (DSC) Part 6: Oxidation induction time (isothermal OIT) and oxygen Induction of temperature (dynamic OIT) determination

Standard Test Method for Hydraulic Basic Parameters of Water Saving Irrigation Equipment

3 Terms and definitions

GB/T 17187-2009, GB/T 19278-2003 defined and the following terms and definitions apply to this document.