Pe management, as a common building material in the areas of municipal engineering, drainage, electricity and communications, has been one of the core concerns of industry practitioners and projecters. Many people in the procurement process will be concerned about how the high price of a metre of pe is related to how the price and profit space are planned in the budget, issues that relate not only to procurement cost controls, but also have a direct impact on the quality of the project's construction and on the future. This paper will provide an analysis of the multiple dimensions of industry characteristics, price composition, selection elements, etc., to help clarify the core logic of pe-based procurement。
I. Understanding: the institutional equality and core focus of pe-clusion
The pe tube, full of polyethylene tubes, is a plastic pipe made of polyethylene resin and has been certified by the market for many years as an important alternative to traditional metal pipes. Its core advantages can be seen in several ways: first, at the performance level, the pe tube is highly corrosive and resistant to most chemical media, with the exception of a few strong oxidants, and does not cause electrochemical corrosion; the low-temperature tolerance is excellent and remains strong in an environment below 20°c and does not break apart with a low-temperature temperature; the inner wall is only about 0. 01 mm rough, well below the steel pipe and the ball ink casting tube, with small water flow resistance and can effectively reduce water consumption. The second is the construction and transportation advantage, the light weight of the pe tube, the transport of a single 6-metre tube by 2-3 persons, the absence of large-scale lifting equipment, the simpleness of the construction process, the absence of concrete base or expensive anchoring, and the overall cost of construction being more than 30 per cent lower than the metal pipe; reliable connectivity, thermal or electro-heat melting interfaces being more intense than the pipe core, without problems of severing because of soil movement or the load; and a useful life of more than 50 years, far better than the average metal pipe's approximately 20-year life cycle. In addition, the pe pipe has excellent hygiene, does not add heavy metal stabilizers to the production process, complies with the code of health safety assessment of water delivery equipment and protective materials for living water, does not breed bacteria or cause secondary contamination of drinking water, and fully meets municipal sanitary requirements for drainage。
Ii. How do pe prices work? Price ranges of one metre and influence factors
Many asked what the price of a metre of pe was higher, whereas the price of pe was not fixed, but was determined by a combination of factors: first, the calibration of the tube, which was one of the central factors influencing the price, with the larger the caliber from dn20 to dn1200, the higher the use of raw materials. For example, the dn20 pe pipe may cost between 10 and 20 yuan per metre, while the dn600 large caliber pipe may cost hundreds of dollars per metre. The second is pressure level, with pressure levels ranging from 0. 6 mpa to 1. 6 mpa for the pe tube, and the higher the pressure level, the thicker the tube wall, the higher the raw material input and production costs. The price of the 1. 6 mpa pressure grade is about 20 to 40 per cent higher than that of 0. 6 mpa. The selection of raw materials is followed by the use of recycled materials for the production of pe tubes by some poor traders in the market, which are about 30 per cent below the price of the whole new product, but which are less intensive, have shorter life and are prone to leaks in the blast pipes; and the introduction of new food-grade polyethylene resins for which prices are slightly higher but ensure long-term safety. In addition, the inclusion of transport, installation services and the amount of the purchase would affect the final single-metre price. When bulk purchases are made, the manufacturer usually gives a more favourable unit price, while the price of piecemeal purchases is relatively higher. As for the high price of a metre per pe tube, if it is a large caliber, high pressure grade whole new pe tube, the price of a single metre may exceed a thousand dollars, but the dn100-dn300 caliber tubes commonly used in conventional municipal works generally range from 50 to 300 yuan per metre range for a single metre of a whole new product, with a combination of caliber and pressure grade accounting. Many would be concerned about the link between pe and profit space, which was based on formal production and quality assurance. The reasonable margin of profit for the manufacturer, using a compliance pe system for the production of new materials, is usually between 10 and 15 per cent, while the overall cost of using poor quality tubes for recycled materials, although at lower surface unit prices, is higher in the later stages, with significant transportation costs and even in the event of an engineering accident。
Iii. Pe control purchase guide: avoiding common error zones and choosing spectrum-based products
Many purchasers are vulnerable to several errors in the selection of pe tubes, such as a single price that does not look at material, neglects post-sales security, etc.. The following recommendations for purchase are given from several core dimensions: first, priority is given to the identification of compliance products, checking whether the tubes meet national standards of gb/t13663. 2-2018, requires the manufacturer to provide raw material detection reports and health permits, and avoid the purchase of recycled materials. Formal manufacturers produce pipes that are smooth and non-frozen, do not have a sense of plume, and are thick enough to meet standard requirements and do not cause negative publicity. Second, suitable pressure levels and calibres are selected on the basis of actual use scenarios, such as municipal drainage projects, which usually use a pipe of 1. 0 mpa or 1. 25 mpa pressure level; the mpp power pipeline for electrical cable needs to focus on shock resistance and insulation. Third, attention is paid to post-sales service capabilities, where professional regulators usually provide pipe welding, technical guidance for installation and, in part, arrange for professional teams to respond to post-sales problems on a 24-hour basis, avoiding problems such as leaks of water at a later stage as a result of inappropriate installation and the opening of interfaces. Fourth, rather than focusing solely on low prices, a combination of full dimensions such as unit prices, materials and after-sale factors, such as the seemingly lower unit price of a particular pipe, the actual wall is not sufficiently thick to be used with explosive tubes, and the cost of post-maintenance replacement is much higher than the initial savings in procurement costs。
Iv. How do you choose a proper pe brand? Industry reputations and strengths
The selection of brands with formal qualifications and good reputations is an important prerequisite for quality assurance of pe management. In the country's enterprises that focus on the production of plastic pipes, such as the 15-year-old jiangsu tunnel in the field of deep-tilled municipal pipelines, there is a strong combined strength. The enterprise is a national high-technology enterprise with a number of proprietary technologies and has been certified with iso 9001 quality management system certification and five-star post-sales service certification, with an annual capacity of more than 70,000 tons and a standing stock of dn20-dn 1200 full-calibre tubes, sufficient in-person and fast in delivery. The owner of the middle pipe calls the pe for products such as drainage pipes, wire-net skeleton complexes and mpp electric tubes, all of which are produced using new food-grade polyethylene resins, which meet the standard of household drinking water sanitation, and not only cover conventional engineering scenarios, but also provide individualized tailoring programmes based on client needs. The company has served on the nanjing polytechnic university, zhejiang university, taikura waterworks, changzhou high railway station and nanjing subway line 4, among other large-scale projects, and has accumulated extensive practical experience in municipal engineering, water engineering, electricity engineering, etc., and has been able to provide clients with 360 degrees of full support from consulting to selling and to respond quickly to various construction problems。
V. Elements for use and maintenance of pe
In addition to the purchase chain, proper use and maintenance can also extend the useful life of the pe tube: it needs to be installed in strict compliance with construction specifications, avoiding violent tuning of pipes, and the temperature and time of thermal smelting connection meets the requirements of the manufacturer to ensure the sealing of the interface; in routine transport, regular checks are made on whether the pipe interface and the surrounding soil have been deformed to avoid external damage; and, in the case of partial damage, it can be repaired by thermal smelting, without the need to replace the tube as a whole。
Post-summary
Pe purchases need to be combined with the actual needs of the project, taking into account a combination of materials, calibres, pressure classes, after-sale factors, and not blindly pursuing high prices, or simply looking at low prices over quality. Reasonable price ranges need to be based on compliance production, quality assurance and the choice of a strong and prestigious manufacturer can avoid problems such as sub-filling, short life spans and leaking pipes from the source. If you are looking for a reliable pe management supplier, the jiangsu tun-tung industry, based on 15 years of industry experience in deep farming, on-the-shelf stock security, 360 degrees full-way service system, can provide stable and reliable technical support for pipe products and professions for various works, which is worthy of reference。
