Standardization of plastic piping products

Liu Qiuning Zhao Qihui Chen Jiaqi

(National Technical Committee for Standardization of Plastic Products, Sub-Technical Committee for Plastic Pipes, Fittings and Valves)

As a new type of building material production, plastic pipe products have developed rapidly in recent years. The plastic pipe industry has become an important industry in my country. At present, almost all plastic pipe products are produced abroad. Similar products will soon be produced in my country. More attention is paid to the standardization of plastic pipes. Entering the 21st century, developed countries in the world have strengthened the research on standard development strategies and formulated standard development strategies and related policies. This is because the status and role of standards are becoming more and more important in today's accelerating process of economic globalization. This article makes some basic introductions to the standardization of plastic pipe products at home and abroad.

1. National standardization policies and regulations and centralized management

Article 3 of the Standardization Law of the People's Republic of China: The task of standardization work is to formulate standards, organize the implementation of standards and supervise the implementation of standards. Standardization work should be incorporated into national economic and social development plans.

Article 4 of the Standardization Law of the People's Republic of China: The state encourages the active adoption of international standards.

Article 5 of the Standardization Law of the People's Republic of China: The standardization administrative department of the State Council shall uniformly administer the national standardization work. The relevant administrative departments of the State Council shall divide their labors to manage the standardization work of their own departments and their own industries.

In order to give full play to the role of scientific and technical personnel and experts in standardization of production, use, scientific research, teaching and management, speed up the formulation and revision of standards, improve the level of standards, and do a good job in the publicity and implementation of standards, according to the "Chinese According to the Standardization Law of the People's Republic of China, the National Standardization Management Quarterly Committee of China has established a "National Professional Standardization Technical Committee" in various fields according to the division of labor. By 2000, 260 national professional standardization technical committees, more than 420 sub-committees had been established, and more than 27,200 experts and managers from various fields had been hired as committee members.

The National Technical Committee for Standardization of Plastic Products (CSBTS/TC48) was established in 1984 by the National Standardization Administration of the People's Republic of China (formerly the National Bureau of Standards). Entrusted by the National Standardization Administration of China, TC48 is responsible for the work of national standards and industry standards for plastic products and the technical centralized management, and also undertakes the technical counterpart work with the International Standards Organization. The Secretariat of the National Technical Committee for Standardization of Plastic Products (TC48) is located in the Light Industry Plastics Processing and Application Research Institute. TC48 has three sub-technical committees, of which the third sub-technical committee TC48/SC3 is the plastic pipe, pipe fittings and valve sub-technical committee, which is responsible for organizing the formulation and revision of national standards and industry standards for domestic plastic pipe products, and undertakes ISO on behalf of China. / TC138 [Technical counterpart of the Technical Committee for Standardization of Plastic Pipes, Fittings and Valves for Fluid Transport], responsible for expressing positions on relevant international standard technical documents and participating in relevant international standards meetings. In the related work of formulating and revising national standards and industry standards, the SC3 Technical Committee earnestly implements the national policy of "actively adopting international standards" and "actively promoting the metric series", and promotes the formulation of national and industrial standards in this field. The revision work is in line with international standards.

Standards are the basis for guiding the production and operation of enterprises. In my country. By publishing national standards, industry standards and local standards, specific provisions are made on the technical requirements and test methods of various products. For products that already have national standards or industry standards, enterprises should abide by them; if there is no superior standard, they should Develop corporate standards for products. Fierce market competition has made many enterprises realize the importance of product quality. For this reason, enterprise standards that are lower than national standards and industry standards should not be formulated when the national standards or industry standards are not met. The state encourages enterprises to formulate industry standards that are stricter than those of their superiors.

Article 6 of the Standardization Law of the People's Republic of China: For technical requirements that need to be unified nationwide, national standards shall be formulated, and national standards shall be formulated by the standardization administrative department of the State Council. For technical requirements that do not have national standards but need to be unified within a certain industry in the country, industry standards can be formulated. The industry standard shall be formulated by the relevant competent administrative department of the State Council, and submitted to the relevant administrative department of the State Council for formulation, and shall be reported to the competent administrative department of standardization under the State Council for the record. After the national standard is promulgated, the industry standard shall be abolished. For the safety and sanitation requirements of industrial products that do not have national air standards and industry standards but need to be unified within the scope of provinces, autonomous regions, and municipalities directly under the Central Government, local standards can be formulated. Local standards shall be submitted to the standardization administrative department of the province, Zuantai District, or municipality directly under the Central Government, and shall be reported to the standardization administrative department of the State Council and the competent department of the State Council for the record. After the national standard or industry standard is promulgated, the local standard shall be abolished. When the products produced by an enterprise do not have national standards and industry standards, enterprise standards shall be formulated as the basis for organizing production. The company's product standards must be reported to the local government standardization administrative department and relevant administrative departments for the record. If there are existing national standards and unemployed standards, the state encourages enterprises to formulate enterprise standards that are stricter than national standards or industry standards, and apply them within the enterprise. If the law has other provisions for the formulation of standards, the provisions of the law shall be followed.

2. Standardization work of foreign and international plastic pipe products

ISO is the abbreviation of International Organization for Standardization for Standardization (abbreviated as ISO). The organization was established on October 14, 1945 by China, Australia, Canada, France, the United Kingdom, the United States, the former Soviet Union, etc. at the 25-year National Love Conference in London. ISO is an international alliance of non-governmental standardization organizations with nearly 140 members. It has close links with many organizations of the United Nations. Cooperating with more than 400 international organizations on standardization issues, it is one of the most important international scientific and technological cooperation organizations in the world.

The purpose of ISO is to promote the progress of standardization work worldwide and to expand cooperation in knowledge, science, technology and economy. The main task is to formulate international standards, coordinate the standardization work around the world, and cooperate with other international organizations to study related standardization work.

ISO's standard-setting work is accomplished through the technical work of more than 26,000 technical organizations and more than 20,000 experts. The technical organization is composed of more than 224 technical committees (TC), more than 6,000 sub-technical committees (SC) and more than 1,700 working levels (WG). The main technical work of ISO is accomplished by publishing international standards. At present, ISO has published nearly 14,000 various standards, of which ISO/TC138 Technical Committee on Plastic Pipes, Fittings and Valves for Fluid Conveying is one of the most active committees. All kinds of plastic pipe products involved in ISO/TVC138, as a new type of building material, have developed greatly in all countries of the world in the past two decades, forming an important industry. These products have also received attention from all walks of life in China and have been widely used.

ISO/TC138 [Technical Committee on Plastic Pipes, Fittings and Valves for Fluid Transport], works more actively in the International Organization for Standardization. She has 7 sub-technical committees, 31 formal members of the committee (China is a regular member), and 30 observers indivual.

The sub-technical committees are:

ISO/TC138/SC1 Sub-committee on plastic pipes and fittings for sewage and wastewater discharge

ISO/TC138/SC2 Subcommittee on plastic pipes and fittings for water supply

ISO/TC138/SC3 Subcommittee on Plastics Pipes and Fittings for Industrial Use

ISO/TC138/SC4 Subcommittee on Plastic Pipes and Fittings for Gas Transmission

ISO/TC138/SC5 Subcommittee on general performance test methods for plastic pipes, fittings, valves and accessories

ISO/TC138/SC6 Subcommittee on Reinforced Plastic Pipes and Fittings for Various Purposes

ISO/TC138/SC7 Subcommittee on Thermoplastic Valves and Accessories

ISO/TC138 holds a large committee meeting every two years. At this time, various sub-technical committees of ISO/TC138 also hold annual meetings at the same time. Each sub-technical committee of ISO/TC138 holds an annual meeting every year. From October 14th to 18th, 2001, TC48/SC3 invited the annual meeting of ISO/TC138/SC1, 2, and 5 three sub-committees to be held in Beijing. A total of 20 Chinese delegations attended the meeting.

China XSBTS/TC48/SC3 National Plastic Products Standardization Technical Committee Plastic Pipes, Pipe Fittings and Valves Sub-Technical Committee Under the leadership of the National Standardization Management Committee, it undertakes the technical counterpart work with the international standard organization ISO/TC138. Since 1986, my country has risen from "0" (observation) member to "P" (formal) member. Since 1985, TC48/SC3 has successively organized groups to participate in the annual meeting of ISO/TC138 and actively participated in the international standardization of plastic piping systems. , so that my country's standardization work in this field is in line with international standards.

As of 5 copies this year, the official standards issued by ISO/TC138 include 184 general basic standards, basic standards, method standards, product standards, technical regulations and technical reports. ISO/TC138 first establishes the method standard of the basic standard, and completes the product standard on this basis. Most of the method standards and basic standards have considerable professional depth, and the standards are often formulated on the basis of the participation of scientific research units and colleges and universities in a large number of researches. Test methods such as chemical resistance, long-term pressure test, stiffness test, and rapid crack propagation are all subjects with considerable theoretical concentration. The experts of ISO/TC138 technical committee mainly come from the production enterprises. They are highly motivated in ISO activities, and major companies have capable technical personnel to participate in international standardization work.

The European Union Organization (EU) standardization strategy emphasizes the need to further expand the participating countries of the European standardization system, to unify the standardization proposals in the International Organization for Standardization, to form a European position in international standardization activities, and to strengthen the competitiveness of European industries in the world market.

Developed countries such as the United States and Japan have taken ensuring the market adaptability of standards, international standardization strategies, coordination and implementation of standardization policies and research and development policies as the focus of their standardization strategies. At the heart of their standardization strategy is the international standardization strategy. ? EU also focuses on the international standardization strategy. It is necessary to carry out standardization proposals in a unified manner in the International Organization for Standardization, and to form a European position in international standardization. Therefore, EU has an absolute advantage in the international standardization arena. In the plastic piping system standard ISO/TC138 In the field, the United States, Japan and the EU are deeply at a disadvantage.

In order to effectively promote international standard work, developed countries focus on cultivating talents who are familiar with ISO/IEC international standard guidelines and have professional knowledge. In order to better participate in international standardization activities, especially in the international standardization of plastic pipes, Japan has high requirements on the quality of talents, requires high English proficiency, profound knowledge, and is an expert in technology or standardization in this field; masters the entire international technology and economy. Status trends; know the competitiveness and position of their own enterprises and industries in the country and the world, as well as the trends of national enterprises and industries related to the technology; understand the development strategies of enterprises and industries in this field and the policies of relevant national governments strategy, etc.; have good language expression ability, know the positive role and long-term impact of infiltrating the national standard or enterprise standard proposal into the international standard.

Actively adopting international standards and foreign advanced standards is the guideline for standardization in my country. It is an important technical and economic policy of our country and an important part of technology introduction. It plays an important role in promoting technological progress, improving quality and social economic benefit, expanding foreign trade and improving the level of standardization. For the reality that my country is about to join the WTO, it is more urgent to be more closely aligned with the International Organization for Standardization.

3. Standardization work of plastic pipe products in my country

After CSBTS/TC48/SC3 was established in 1984, it is currently the fourth committee. The members are composed of raw materials, production enterprises, testing, construction, water conservancy scientific research units, design institutes, colleges and universities and other units. There are currently 47 formal members. At present, there are still some large-scale enterprises actively applying to participate in the sub-technology committee. The secretariat of the SC3 sub-committee is located in the Institute of Industrial Plastics Processing and Applications.

At present, the SC3 sub-technical committee has completed 90 national standards and industry standards. In 2000, 27 national standard formulation projects were reported and approved. There are more than 20 standard projects in work.

All members of the SC3 sub-technical committee have greatly improved their professional and technical level through training, seminars, and various domestic and international technical exchange activities while formulating and revising national standards and industry standards; at the same time, the drafting of enterprise and national standards The work has also really cultivated the technical force of the enterprise, formed the technical force of a technical enterprise with a considerable level, and formed a technical team and a working team with a considerable level. The SC3 sub-technical committee pays attention to actively organizing the study of members in various work, and strives for the help of national experts. The advanced foreign technology and information will be communicated to the committee members in time, so that the standard work can be completed smoothly and be in line with international standards. While completing the formulation and revision of the standard, the understanding and implementation of the standard have a deeper understanding, so that the technical personnel of the production enterprise can take the initiative in quality control.

In the current market economy, enterprises are the main body of the market economy. According to the national standardization policy and spirit, the work characteristics of SC3 sub-technical committees are also based on enterprises, and carry out standard formulation and revision work, so that production enterprises can consciously maintain product quality, Implement and enforce standards and regulate the market.

During the ten years from 1984 to 1995, the focus of SC3's work was that the standards for rigid PVC pipe products for various purposes were basically able to meet the needs, and most of the standards had been carried out on the basis of implementation experience or were being revised. .

After further analysis of the composition of international standards, we learned that with the continuous progress of production technology of polyolefin raw materials, the development of special materials for pipes has achieved great development in practice. The standardization work on polyolefin products in the International Organization for Standardization is also more active, and there is a big gap between my country and the world in this field. Since 1995, SC3 has decided to shift the focus of standardization work to the relevant standards for polyolefin products, and at the same time focus on further improving the basic standards. On the basis of organizing a large number of studies on international standard documents, it has successively completed the formulation and revision of national standards such as "Polyethylene Pipe for Water Supply" and "Polypropylene Pipe System for Cold and Hot Water". At the same time, it is also organizing and strengthening relevant standards, especially improving the basic standards. During the period from 1997 to 1999, the revision of GB4271--84 "Nominal Diameter and Nominal Pressure of Thermoplastic Pipes" was completed. The latest regulations on the grading of pipe materials, the GB-98 "General Wall Thickness Table for Thermoplastic Pipes" has been revised, and the wall thickness design principles of pipes are in line with international standards; the ISO12162:1995 "Pressure Application Pipes and Fittings" have been completed. The transformation work of thermoplastic materials - classification and naming (overall use (design) coefficients) stipulates the classification principle of special materials for pipes; together with university professors, doctoral tutors, committee members and experts, after 5 years of work, Completed the transformation of the difficult international standard ISO/DIS9080: 1997 "Determination of the long-term hydrostatic strength of thermoplastic pipe materials by external plucking method for plastic piping systems", which is the basic experimental method for material grading and statistics for data sorting These standards are the most important basic standards in this field, and the establishment of these standards lays the foundation for the comprehensive integration of relevant product standards with international standards.

As a new type of building material, plastic pipe products have been more and more widely used in the world in recent years, and have also received attention from many sides. my country has made great progress since the end of the 1980s. The production technology of polyvinyl chloride, polyethylene, propylene, etc. as raw materials has also undergone great changes and development. The pipeline product industry has become one of the important industries in my country.

At present, the work of the standardization sub-committee for plastic pipes, pipe fittings and valves is very active, the team is growing and the level is constantly improving. SC3 sub-committee will do its best to make a greater contribution to the healthy development of plastic pipe products in my country.

TC48/SC3 Catalogue of national standards and industry standards completed after 1998:

Standard No. Standard Name Remarks

GB/T3682-200 Determination of Thermoplastic Melt Mass Flow Rate and Melt Volume Flow Rate

GB/T4217-2001 Nominal outer diameter and nominal pressure of thermoplastic pipes (divided series)

GB/T6111-200X Test method for hydraulic resistance of thermoplastic pipes for fluid conveying Completed

GB/T6671-2001 Thermoplastic pipes - Determination of longitudinal and longitudinal shrinkage

GB/T8082-2001 Thermoplastic pipes and fittings - Determination of Vicat softening humidity

GB/T8083-2001 Injection molding rigid polyvinyl chloride (PVC-U), chlorinated polyvinyl chloride (PVC-C), acrylonitrile-butadiene-styrene terpolymer (ABS) and acrylonitrile-benzene Ethylene-Acrylate Terpolymer (ASA) and Pipe Fittings Thermal Oven Test Method

GB/T9647-200X Determination of Ring Rigidity of Thermoplastic Pipes Completed

GB/T10002.2-200X Rigid PVC Pipe Fittings for Water Supply Completed

GB/T10798-2001 General Wall Thickness Table of Thermoplastic Pipes

GB/T13663-2001 High-density polyethylene (PE) pipes for water supply

GB/T14152-2001 Test method for external impact resistance of thermoplastic pipes - Clockwise rotation method

GB/T15558.1-1995 Buried polyethylene pipes for gas is being revised

GB/T15558.2-1995 Buried polyethylene pipe fittings for gas is being revised

GB/T18252-2000 Plastic piping systems - Determination of long-term hydrostatic strength of thermoplastic pipes by extrapolation

GB/T18474-2001 Cross-linked polyethylene (PE-X) pipes and fittings - Test method for cross-linking degree

GB/T18475-2001 Classification and Nomenclature of Materials for Thermoplastic Pipes and Fittings - Overall (Use) Coefficient

GB/T18476-2001 Polyolefin pipes for fluid transportation - Test method for measuring the slow growth of cracks in notched pipes for resistance to crack propagation

GB/T18477-2001 Rigid Polyvinyl Chloride (PVC-U) Double Wall Corrugated Pipe for Buried Drainage

QB/TXXXX－200X Adhesive for pipe fittings of rigid PVC pipes (industry standard) To be released

GB/T XXXX.1-200X Hot and cold water polypropylene piping system-Part 1: General; To be published

GB/T XXXX.2-200X Polypropylene piping system for hot and cold water - Part 2: Pipes To be published

GB/T XXXX.3-200X Cold and hot water polypropylene piping system-Part 3: Pipe fittings To be published

GB/T XXXX.1-200X Industrial Chlorinated Polyvinyl Chloride (PVC-C) Piping System Part 1 To be published

GB/T XXXX.2-200X Industrial Chlorinated Polyvinyl Chloride (PVC-C) Piping System Part 2: Pipes To be published

GB/T XXXX.3-200X Industrial Chlorinated Polyvinyl Chloride (PVC-C) Piping System Part 3: Pipe Fittings To be published

GB/T XXXX.1-200X Chlorinated Polyvinyl Chloride (PVC-C) Piping System for Cold and Hot Water - Part 1: General Provisions To be published

GB/T XXXX.2-200X Chlorinated polyvinyl chloride (PVC-C) piping system for hot and cold water - Part 2: Pipes To be released

GB/T XXXX.3-200X Chlorinated Polyvinyl Chloride (PVC-C) Piping System for Cold and Hot Water Part 3: Pipe Fittings To be published

GB/T XXXX.1-200X Chlorinated polyvinyl chloride (PVC-C) piping system for hot and cold water - Part 1: General; To be published

GB/T XXXX.2-200X Chlorinated Polyvinyl Chloride (PVC-C) Piping System for Cold and Hot Water - Part 2: Pipe; To be published

GB/T XXXX.1-200X Aluminum-plastic composite pressure pipe Aluminum pipe lap welding aluminum-plastic pipe To be released

GB/T XXXX.2-200X Aluminum-plastic composite pressure pipe Aluminum pipe lap welding aluminum-plastic pipe To be released

GB/T XXXX-200X Thermoplastic pipes and fittings for hot and cold water systems To be released

GB/T 8804.1-200X Thermoplastic pipes - Determination of tensile properties - Part 1: General test methods To be published

GB/T 8804.2-200X Thermoplastic pipes-Determination of tensile properties-Part 2: Rigid polyvinyl chloride (PVC-U), chlorinated polyvinyl chloride (PVC-C) and high-impact polyvinyl chloride (PVC-HI) Tube to be released

GB/T 8804.3-200X Thermoplastic pipes - Determination of tensile properties - Part 3: Polyolefin pipes To be published

GB/T XXXX.2-200X Terminology of plastic pipes, fittings and valves in work

GB/T XXXX.1-200X ABS plastic pipe in work

GB/T XXXX.1-200X Elastomeric sealing ring type socket joint for polyvinyl chloride (PVC-U) pipe - the national standard for the test method of angle seal

GB/T XXXX.2-200X Elastic sealing ring socket joint for polyvinyl chloride (PVC-U) pipe - negative pressure test method

GB/T XXXX.2-200X Test method for opacity of plastic pipes

GB/T XXXX.2-200X Thermocycling test method for combined system of pipes and fittings for thermoplastic piping systems for hot and cold water

Preparation of GB/T XXXX.2-200X Polyethylene (PE) Electrofusion Components

GB/T XXXX.2-200X Peel test method for polyethylene (PE) electrofusion components

GB/T XXXX.2-200X Polyethylene (PE) Electrofusion Assemblies Extrusion Peel Test Method

GB/T XXXX.2-200X polyethylene pipe resistance to slow crack growth cone test method

GB/T XXXX.2-200X Thermoplastic pipes for fluid transportation - Determination of crack propagation resistance (RCP) Small size test

GB/T XXXX.2-200X Polybutene (PB) piping system for hot and cold water - Part 1: General;

GB/T XXXX.2-200X Polybutene (PB) piping system for hot and cold water - Part 2: Pipes

GB/T XXXX.2-200X PE Structural Wall Buried in Drainage Pipe Part 2 PE Winding Plastic Pipe

GB/T XXXX.2-200X Buried polyvinyl chloride structural piping system-Part 1: PE double-wall corrugated pipe