• Langfang DingYang is a large supplier and manufacture in China that specialized in producing all kinds of flanges and pipe fittings.we have our own pipe fitting factory since 1998 ,which covers 100 acres. In 1998, we invested and set up a new flange factory. Up to now, we have a complete production system, and become a professional and competitive group in this field.

    As an experienced exporting company, Langfang Ding Yang has been export for almost 10 years. We have clients all over the world and our products and service have been approved by many of our clients. We offer more competitive price to our clients to help them benefit more in the industrial market.​​​​​​​

    Langfang Ding Yang insist on our company policy “Top quality, Sincere cooperation, Consistent improvement, Pursuing perfect” and “Mutual benefit, Mutual Success”. We use the quality to occupy the market, use our sincerity to serve our customers.

Langfang DingYang is one of the leading companies dealing in exporting pipe fittings, flanges and tubes etc. Our product range includes: Carbon, alloy and stainless steel pipes in various grades including PI5CT,API5L,ASTM, ISO,JIS,ST, DIN, GB/T Carbon, alloy and stainless steel flanges including ANISI, ASME, JIS, DIN, NPT etc. Carbon and Stainless steel valves including ANISI, API, JIS, DIN, NPT. We have the experienced and professional technical team, the advanced production equipments, the predominant area advantages, and the convenient transportations. We will do our best to satisfy our customers in all aspects.
We have an excellent technical team, which can be designed according to customers requirements.


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  • Description of Line Spade and Spacer

    Description of Line Spade and SpacerFF/RF /RTJ SIZE: 1/2″-24″ CLASS: 150LB-2500LB STANDARD : ASME B16.48 MATERIAL : 304/304L/304H 316/316L/316H 321/321H 347/347H F51/2205/S31803 F53/2507/S32750 904L/USN8904 310/310SF44/31254/SMO254 C276INCO400/425 600/625 800/825

  • Advantages and maintenance of stainless steel flange

    Flange, also known as flange or flange plate, is the part connecting pipe end and pipe end and valve. Both sides of the flange are connected with the pipe end, and the flange itself has holes. Stainless steel flange is widely used in petroleum, chemical, nuclear power plant, food manufacturing, cons

  • Why the hardness of stainless steel flange is so low

    Materials with low hardness and good toughness such as low carbon steel and aluminum alloy for stainless steel flange are characterized by low hardness and good toughness, difficult chip breaking during cutting, easy to generate chip accretion, which affects the processing surface quality. Therefore

  • Is Stainless Steel Flange The Same As Stainless Steel Butt Welding Flange?

    The nominal diameter of the vessel cylinder and the nominal diameter of the tube of the butt welding flange represent different specific sizes. Therefore, the same nominal diameter of the vessel stainless steel flange and the stainless steel butt welding flange, their sizes are also different, and t


We hold "hundred percent customers' satisfaction" as our goal, providing timely and efficient after-sales services to our customers.​​​​​​​
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We have an excellent technical team, our products in quality and quantity will make you satisfied, welcome to buy
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