GB/T 20674.2-2020Plastic pipes and fittings Polyethylene system welding equipment - Part 2: Electrofusion connection (English PDF)

Foreword

GB/T 20674 "Plastic pipes and pipe fittings polyethylene system welding equipment" is divided into the following 4 parts.

---Part 1.Hot Fusion Butt;

---Part 2.Electrofusion connection;

---Part 3.Operator code;

---Part 4.Traceable coding.

This part is Part 2 of GB/T 20674.

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

This part replaces GB/T 20674.2-2006 "Plastic pipes and pipe fittings polyethylene system welding equipment Part 2.Electrofusion

Next. Compared with GB/T 20674.2-2006, the main technical changes in this part are as follows.

--- Increased the input voltage range of the electric welding machine (see Chapter 1);

---Modified the normative references (see Chapter 2, Chapter 2 of the.2006 edition);

---Modified terms and definitions (see Chapter 3, Chapter 3 of the.2006 edition);

---Modified the content of Chapter 4; Added the corresponding description table of the names, features, and codes of different types of electric welding machines (see Chapter 4,

Chapter 4 of the.2006 edition);

---Added the requirements for splice record content and splice data transmission format and other technical requirements (see 5.1.6.3);

--- Added appearance and safety requirements (see 5.2 and 5.3);

---Adjust the contents of the original Appendix B to Chapter 5 (see 5.7, Appendix B of the.2006 edition);

--- Increase the resistance value deviation range (see 5.8);

---Added the total energy deviation range requirement (see 5.9.1);

---Adjust the technical requirements of "input voltage", "frequency" and "short circuit" to the necessary safety program modules, collectively referred to as safety program modules (see

5.10, 5.2.5.3.1, 5.2.5.3.2 and 5.2.5.3.3 of the.2006 edition);

---Adjust the contents of the original Chapter 6 to Chapter 5 (see 5.11, Chapter 6 of the.2006 edition);

---Added the ambient temperature compensation function (see 5.11.4.3);

---Added the requirements of the memory warning prompt and the monitoring content of the splicing process (see 5.12);

---Adjust the test conditions of shock performance and vibration performance to Chapter 5 and Chapter 7 (see 5.13 and 7.13, 5.3.1 of the.2006 edition

1 Scope

This part of GB/T 20674 specifies the terminology and terms of polyethylene (PE) piping system electrofusion connection equipment (hereinafter referred to as "electrofusion welder")

Definition, classification, requirements, test methods, random documents, maintenance, inspection rules, marking, packaging, transportation and storage.

This part, together with other parts of GB/T 20674, is applicable to gas/water supply polyethylene pipes and pipe fittings with welding equipment. Polyethyl

The pipes and fittings for olefin gas meet the requirements of GB/T 15558 (all parts), and the pipes and fittings for drinking water and general pressure water delivery are

Meet the requirements of GB/T 13663 (all parts).

This section applies to electric fusion welding machines controlled by voltage or current, and electric fusion welding machines are suitable for pipe fittings heated by resistance wire.

The electric welding machine is divided into three input voltage levels. P1 voltage (SVLV, not greater than 50V); P2 voltage (LV, greater than 50V and not

Greater than 250V); P3 voltage (HV, greater than 250V and not greater than 400V).

The normal working environment temperature range of the electric welding machine is -10 degrees C~40 degrees C.

Note 1.If the ambient temperature is out of the range, it will be agreed upon by both parties.

Note 2.Electrofusion welding machine is used for prefabricated connection of gas/water supply components (such as valves, steel-plastic conversion, etc.) or used for nuclear power pipes, PE-RT pipes for cold and hot water,

When connecting industrial pipes, composite pipes, etc., the supply and demand parties shall negotiate and agree.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article

Pieces. For undated references, the latest version (including all amendments) applies to this document.

GB/T 2423.5 Environmental Test Part 2.Test Method Test Ea and Guideline. Impact (GB/T 2423.5-2019,

IEC 60068-2-27.2008, IDT)

GB/T 2423.10 Environmental Test Part 2.Test Method Test Fc. Vibration (Sine) (GB/T 2423.10-2019,

IEC 60068-2-6.2007, IDT)

GB 2894 Safety signs and guidelines for their use

GB/T 4208 enclosure protection class (IP code) (GB/T 4208-2017, IEC 60529.2013, IDT)

GB/T 5013.4 Rubber insulated cables with rated voltages of 450/750V and below Part 4.Flexible wires and flexible cables (GB/T 5013.4-

2008, IEC 60245-4..2004, IDT)

GB/T 5013.6 Rubber insulated cables with rated voltages of 450/750V and below Part 6.Electric welding machine cables (GB/T 5013.6-

2008, IEC 60245-6.1994, IDT)

GB/T 19212.1-2016 Safety of transformers, reactors, power supply units and their combinations Part 1.General requirements and tests

(IEC 61558-1.2009,MOD)

GB/T 19212.5 Safety regulations for transformers, reactors, power supply units and similar products with a power supply voltage of 1100V and below

Part 5.Special requirements and tests for isolation transformers and power supply devices with built-in isolation transformers (GB/T 19212.5-2011,

IEC 61558-2-4.2009, IDT)

GB/T 20674.3 Polyethylene system welding equipment for plastic pipes and fittings-Part 3.Operator code (GB/T 20674.3-

2020, ISO 12176-3.2011, MOD)

GB/T 20674.4 Polyethylene system welding equipment for plastic pipes and fittings-Part 4.Traceability coding (GB/T 20674.4-