In the building drainage system, PVC drain pipe fittings are the "joints" that connect pipes and maintain smooth drainage - from small balcony floor drains to large bathroom risers. The quality of each pipe fittings directly affects the life and experience of the system. Poor-quality pipe fittings are easy to age and crack, which may cause water leakage, odor diffusion and even neighborhood disputes; while high-quality pipe fittings can resist corrosion and impact, and you don't have to worry about it for more than ten years. Therefore, choosing a stable quality PVC drain pipe fittings manufacturer is a "compulsory course" for engineering parties, decoration companies and even self-installed owners.

So, what is a "stable quality" PVC drain pipe fittings manufacturer? The core depends on four key points:

First, the raw materials are not adulterated. High-quality manufacturers will definitely use PVC resin powder (such as SG-5 type) that meets the GB/T 5761-2006 standard, and will never add recycled materials or fillers to reduce costs. Some companies will also establish a "raw material traceability system" - each batch of resin powder has a test report from the supplier. Before warehousing, measure the molecular weight and volatiles by yourself, and check it from the source.

Second, the standard is not discounted. Reliable manufacturers will strictly follow the "Hard Polyvinyl Chloride (PVC-U) Pipe Fittings for Building Drainage" (GB/T 5836.1-2006) production, and even tighten enterprise standards. For example, the wall thickness of pipe fittings, the national standard requires 2.0mm, and some manufacturers will do 2.2mm; the roundness error of the interface, the national standard is 0.5mm, they can control it within 0.2mm. During the production process, the online testing equipment will monitor the wall thickness and temperature in real time, and the finished product must also be tested by hydraulic pressure (1.5 times the working pressure for 1 hour without water leakage), drop test (1 meter height does not crack on the cement floor) to ensure that each pipe fittings meet the standards.

Third, the equipment is advanced enough. The core of the production of PVC pipe fittings is the injection molding machine and mold - with imported injection molding machines (such as Demag, Haitian), the injection pressure is more stable, and the raw material can be filled more evenly; the accuracy of the mold reaches 0.01mm, and the threads and sockets of the pipe fittings can be tightly sewn, and there will be no problems of "insertion" or "leakage". Some automated production lines can also reduce manual contact and reduce the rate of defective products (for example, reducing the rate of defective products from 0.5% to 0.1%).

Fourth, after-sales is guaranteed. Manufacturers with stable quality will not "sell out and disappear" - they will provide engineering customers with 1-5 years of quality assurance, and household customers also have a warranty period of more than 2 years. In case of installation problems, the after-sales team can respond 24 hours a day, and even give on-site guidance; if it is a product quality problem, it will return and exchange goods unconditionally.

Based on these standards, we can pay attention to the following types of high-quality enterprises:

Old-fashioned deep-cultivation enterprises: This type of enterprise has been doing PVC pipe fittings for more than 10 years, and the technology and management are very mature. For example, a company started to make drainage pipe fittings in 2008, and now has 3 automated production lines, which can produce 50,000 pipe fittings every day, and the defective product rate is controlled at 0.08%. Their raw materials are all from top domestic resin factories, and each batch of goods is attached with a "quality traceability code". Scan the code to see the raw material batch, production time, and test report.

Boutique high-end enterprise: Some manufacturers mainly target the mid-to-high-end market and achieve the ultimate "performance upgrade". For example, a company has added anti-aging additives to PVC resins to extend the service life of pipe fittings from the national standard of 20 years to 30 years; it has also optimized the design of the socket, replacing the traditional flat mouth with a "stepped seal". When connecting, it can be leak-proof without wrapping the raw material belt, which is especially suitable for Xiaobai decoration and self-installation.

Standard Certified Enterprise: This type of enterprise focuses on "compliance" and has passed ISO9001 quality certification, ISO14001 environmental protection certification, and even the European Union's CE certification. For example, a manufacturer uses a closed-loop recycling system in the production process to remake the scraps into raw materials, which will not pollute the environment; the product has also passed the "lead-free test", and children at home can use it with confidence.

Finally, a reminder: when choosing a manufacturer, you can't just look at the publicity, you must visit the field - go to the workshop to see if there is any online testing equipment, go to the laboratory to feel the testing equipment (such as wall thickness gauge, hydraulic testing machine), take a few samples and drop them and press them; you can also ask the engineering party you have cooperated with, such as "Have there been any water leakage problems in this pipe fittings?" Is the after-sales response fast? "

In the end, the" stable quality "of PVC drainage pipe fittings is not blown out by advertisements, but by the strict screening of each bag of raw materials, the precise control of each equipment, and the layer-by-layer detection of each pipe fittings. Choose such a manufacturer to make your home's drainage system" stable "to the end.