Highly recommended page to collect: Practical Guide for Duplex Stainless Steel Manufacturing (1)

The use of duplex stainless steel is becoming increasingly widespread, and users are becoming more familiar with this type of stainless steel. This article introduces the characteristics of duplex stainless steel, and gives the basic principles and practical information of processing and welding duplex stainless steel, which is one of the difficulties in the application of duplex stainless steel.

The contents include: the history of duplex stainless steel, metallurgical, corrosion resistance, mechanical properties, physical properties, technical conditions, quality control, cutting, forming, welding, application and so on.

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What are the advantages of stainless steel tube heat exchangers and brass tube heat exchangers?

AS many people may know there are two typical types of tubes to constructing heat exchangers, which are seamless stainless steel tubes (including duplex stainless steel tubes S31083, 2205, S32750, 904L, etc) and brass tubes. But what are the advantages and disadvantages of this two different heat exchangers?


In fact, the biggest difference is not the heat transfer performance, corrosion resistance is good or bad, but is that copper tubes are less prone to fouling than stainless steel tubes, which many people might do not realize. To give a simple example, some commercial boilers are used without water treatment equipment, but using life is as long as 15 years. The reason is that although the water can foul scale in the copper wall, but it is only flocculent fouling, in this case, as long as we increase the flow of water, fouling scale can not precipitate down.

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Take you to the ferrite stainless steel- the type and characteristics

The reason why stainless steel is “stainless” is due to the chromium contained in it has a significant corrosion resistance.

Ferritic stainless steel is no exception.

Ferritic stainless steel is the main element of chromium (≥10.5%) and iron, and some grades only chromium, some grades in addition to chromium, but also contains other elements (such as Mo, Ti, Nb, etc.) to get some special performance.

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Looking for safety pipe connectors for hydraulic pipes?

Flanges are the most popular components in pipe and tube installations in industries, they are used to connect pipes or tubes. For most of the applications, the normal flanges are enough to provide good connection to pipe lines. However, for pipes under high pressure, such as hydraulic tubing, are they normal types of flanges still safe?

No! To provide safety and leak-free connection of the tubes and pipes under high pressure, the best way is that we use certain type of SAE Flanges.

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SAE flanges /hydraulic SAE flanges-hot products

SAE flanges | Code 61 flange /code 62 flanges SAE flanges / hydraulic SAE flanges are the main product of Younglee group’s factory also.  The products are made according to SAE J 518 C and ISO 6162-1/2, and they are for safe and leak-free flange connections. And now we are one of the first class quality SAE flanges manufacturer in China. Our … Read more

SAE socket weld flanges

SAE Socket Weld Flanges and Counterflanges

SAE Socket Weld Flanges are one of the main types of SAE wled flanges, which are designed and manufactured according to standard ISO 6162-1/ ISO 6162-2. Products are conform to standard SAE J518 as well.

SAE Socket weld flanges

Main styles:


  • ISO 6162-1: for 3000 psi standard pressure series (light duty), known as code 61 flanges as well
  • ISO 6162-2: for 6000 psi high pressure series (heavy duty), known as code 62 flanges as well

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SAE Socket Weld Elbow Flanges

SAE Socket Weld Elbow Flanges are one of the popular type of SAE socket wled flanges. The elbow is usually 90°. So they are know as SAE 90° Flanges as well.

Younglee SAE-socket-weld-elbow-flange

  • Carbon steel SAE 90° Flanges: C45, C20, CQ235, or on requests.
  • Stainless steel SAE 90° Flanges: 304, 316, 316L, 316Ti or equivalent EN/DIN stainless steel grades 1.4301, 1.4401, 1.4404, 1.4571, used for connecting stainless steel hydraulic tubing.

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SAE Screw-in Flanges | SAE threaded flanges

SAE screw-in flanges (SAE threaded flanges) are the main products of Younglee’s SAE flange products group. This product is designed according to ISO 6162-1/-2, and conform to SAE J518C, and comes in two main varieties according to the different thread types:


Size Range:

  • 3000 psi standard pressure series: 1/2″ (DN13) to 5″(DN127)
  • 6000 psi high pressure series: 1/2″ (DN13) to 2″(50.8mm)

Materials available:

  • Carbon steel
  • Stainless steel: AISI 304, 316, 316L, 316Ti or corresponding EN/DIN steel grades 1.4301, 1.4401, 1.4404, 1.4571, other steel grades on request.

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SAE BSPP threaded flanges

SAE BSPP threaded flanges are the SAE threaded flanges with BSPP type thread. As a sub variety, this product followed all the descriptions of SAE threaded flanges. To find information of materials, working pressure, surface treatments and size range, please refer to SAE threaded flanges.


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