We adhere to the principle of mutual benefit and enjoy a good reputation among our customers because of our perfect service, high quality hvac pipe fitting, blind flange supplier, pipe coupling and competitive prices. 'Harmony, practice, innovation, and service' are the basic principles of our company. We are willing to work together with people from all walks of life for the bright future of the 4 inch blind flange industry and make contributions to the rapid development of the industry. We strictly follow the market management philosophy of pre-sales professional training, during-sale installation and commissioning, and after-sales full service to comprehensively improve the market competitiveness of customers. Our outstanding customer service and support ensure prompt and effective resolution of any queries or issues. It is our constant goal to maintain close relationships with our customers and to continually meet their product needs to better serve our customers. We have established a strong reputation for reliability and professionalism. We firmly highlight the principle of 'people-oriented, honest management, scientific and technological innovation'.
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![Flange Spectacle Blind]()
Flange Spectacle BlindBlind flange, also known as blind flange. It is a connection form of flange. It's basically a flange without a hole in the middle. One of its functions is to block the end of the pipeline, and the -
![Steel Alloy Forgings]()
Steel Alloy ForgingsThis standard is issued under the fixed designation A372/A372M.This specification covers relatively thin-walled forgings for pressure vessel use.Three types of carbon steel and six types of alloy -
![Transportation Systems-Flange]()
Transportation Systems-FlangeAccording to ISO 15590-3-2004 -
![Steel Pipe Flanges]()
Steel Pipe FlangesAccording to JIS B 2220-2004 -
![Integral Pipe Flange]()
Integral Pipe FlangeIntegral flanges, also known as Long Weld Neck (LWN) flanges, materials are carbon steel, stainless steel, alloy steel and so on. In various domestic standards, IF is used to indicate the integral -
![Forged Welding Neck Flange]()
Forged Welding Neck FlangeForged Welding Neck flange refers to a flange with a cone neck and butt welded with a cylinder or pipe. It belongs to the integral flange. Due to the excessive structure of the cone neck and the butt -
![Forged Slip On Flange]()
Forged Slip On FlangeA slip-on flange is connected to the pipe or the fittings by two fillet welds, one executed inside and one outside the cavity of the flange. Slip-on flanges are also defined Hubbed Flanges and they -
![Socket Weld Flange]()
Socket Weld FlangeSocket welding flange refers to the pipe end inserted into the flange ring ladder, welded in the pipe end and the outer flange. There are two types with and without a neck. The rigidity of the flange -
![Reducing Flange]()
Reducing FlangeReducing flange, also known as the size head flange or reducing flange, the inner diameter size and the standard flange inner diameter size there is a certain difference, is a diameter change of the -
![Carbon Steel Track Bolts And Nuts]()
Carbon Steel Track Bolts And NutsAccording to A183 − 14 -
![Short Radius Elbow]()
Short Radius ElbowShort radius elbow means that the curvature radius of the elbow is 1 times the diameter of the pipe; Also known as 1D. The material of short radius elbow is stainless steel 201.304, carbon steel 20#, -
![Stainless Steel Pipe Flanges]()
Stainless Steel Pipe FlangesAccording to A182/A182M − 15
Ashely McLaughlin
Our products are good value for money and the design is very new, our boss is very satisfied.
George Duran
I have communicated with the designer for a long time, and it feels very good to have it after I confirm the design plan. They are good and patient.
James Wu
We always believe that the details decides the company's product quality, in this respect, the company conform our requirements and the goods are meet our expectations.
Gene Klein
Once you buy the products of this company, you will like them like me! These products come with the best user manuals I have ever seen, which are easy to understand.
Gertrude Samuels
This company has accumulated rich experience in many years of production, has promoted the progress and development of the industry, and has won wide acclaim. I believe they will continue to surpass
Howard Omalley
Shipping from this supplier was fast and I didn't have to wait long.
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Our company is a pioneer in the transformation and upgrading of the corrosion resistant pipe fitting, Carbon Steel Pipe for Structural Steelwork industry. Yosun (Tianjin) Piping Engineering Co., Ltd. is one of the most professional 4 inch blind flange manufacturers and suppliers in China, specialized in providing high quality customized products. Be free to wholesale 4 inch blind flange in stock here and get quotation from our factory. For price consultation, contact us.