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DIN FITTINGS

Bahasa Indonesia
Material Specification
  • Brass
  • Carbon Steel, Zinc
  • Stainless Steel SS316
Connection Type
  • Bite type
  • Compression end
Size
  • 4mm to 42mm outer diameter (OD)
Working Pressure
  • 100 to 800 bars
Complete set components
  • Fitting body
  • Nut
  • Sleeve
DIN Fittings are designed according to the Deutsches Institut fϋr Normung DIN 2353 / ISO 8434-1 standard. DIN fitting is being called as compression single ferrule fittings which are used to connect thin-walled pipes or tubes. They are also referred to as tube connectors or DIN type tube fittings. They are used in hydraulic systems to ensure a leakage-free flow during operation.

​These fittings are produced in three different series – S, LL, and L series. S series are used for high pressure systems, LL for very light pressure, and L for light pressure. They serve as a form of protector for pipes and tubes working under high pressure.  The working pressure for the DIN fitting ranges from 100 to 800 bars and it uses compression end and bite type connection types.

STUDY CATALOGUE HERE


-->  RFS COMPRESSION FITTINGS

-->  EATON COMPRESSION FITTINGS


1. What is DIN Fitting?

DIN fittings or compression ferrule fittings are used to join two pipes or tubes together. In cases where the pipes or tubes to be connected have thin walls or different materials, a compression single ferrule fitting is one of the fitting tools that could provide a solution. For instance, when two pipes made with copper and stainless steel are to be joined, there’s a need for customized fitting to make them compatible and ensure a smooth flow of fluid. DIN fittings are compression fittings with the addition of ferrule (iron) in them. 

​DIN Fittings are produced in a variety of sizes for flexibility. The sizes of these fittings are a minimum of 4mm to a maximum of 42mm. The working pressure of these compression fittings ranges from 100 to 800 bars. The fittings are manufactured in Germany and Korea. The brand name is Eaton and HSME.  The well-known brand is from the USA named Parker.
SS316 Adjustable Run Tee
SS316 Adjustable Run Tee

2. How are DIN Fittings measured?

DIN fittings can withstand high working pressure. Due to the incessant running of the fitting in the system, strength is needed for a long and smooth running of flow. The maximum working pressure of DIN fittings is 800 bar or 11,600 PSI. They are designed in three series – S, L, and LL. S series can withstand working pressure between 315 to 630 bars. L series work under pressure of 160 bar or 315 bar. The minimum pressure for compression fittings is 100 bars and it only applies to the LL series. 

​Here's a summary table:
SS316 Bulkhead Coupling
SS316 Bulkhead Coupling
Series
Working Pressure
LL
Up to 100 bar
L
Up to 500 bar
S
Up to 800 bar
Series
Size (mm)
Part No.
Working Pressure (bar)
LL
4
4LL
100
LL
6
6LL
100
LL
8
8LL
100
LL
10
10LL
100
LL
12
12LL
​100
L
6
6L
315
L
8
8L
​315
L
10
10L
​315
L
12
12L
315
L
15
15L
315
L
18
18L
315
L
22
22L
160
L
28
28L
160
L
35
35L
160
L
42
42L
​160
Series
Size (mm)
Part No.
Working Pressure (bar)
S
6
6S
630
S
8
8S
630
S
10
10S
630
S
12
12S
630
S
14
14S
630
S
16
16S
400
S
20
20S
400
S
25
25S
400
S
30
30S
400
S
38
38S
315
Compression or DIN fittings are configured into different types. This is to ensure the fittings are useful in different situations. The common fittings are straight and used for connections of straight pipes and hoses. Other available configurations are crosses, tees, nuts, plugs, and caps.

BAHASA INDONESIA

3. What is DIN Fitting material?

DIN fittings can be made of several materials that increase its versatility for usage. The materials are brass, carbon steel, zinc, and stainless steel SS316. These materials are used for compatible systems. 

Brass Fittings: Brass materials are one of the common materials for the manufacturing of pipes and tubes. It has gained more relevance because of its topic qualities and dynamic features. Asides from Compression fittings, brass are used for ballcock adapters, air brakes, fuel line valves, refrigerator cooler fittings, and many more. The benefits of the brass fittings are:
  • Durability: Brass fittings are suitable for use in high pressure systems and retain its structure for a long period. It also works well with heat without cracks or breaks, therefore, it is a good choice for long term projects.
  • High Corrosion Resistance: Corrosion is a common problem that affects tubes and pipes, especially those exposed to harsh weather or salty water. Brass is a metal that contains copper, zinc, and other metals. This chemical composition makes the material able to resist corrosion and perfect for the production of several tools like compression single ferrule fitting. 
SS316 90D Adjustable Swivel Elbow
SS316 90D Adjustable Swivel Elbow
Carbon Steel Fitting: Carbon steel is an element that contains iron, carbon, manganese, copper, silicon, sulfur, phosphorus, molybdenum, nickel, chromium, and vanadium. Carbon steel is simply steel with an addition of carbon. Carbon is added to the element to increase its strength. Carbon steel is mostly preferred in fittings because:
  • Strength: The carbon contained in the material and the heat treatment of the semi-finished product is exposed to contribute to the high strength quality of the carbon steel. This has classified carbon steel fittings as one of the most durable products.
  • Resistance: Carbon steel fittings are resistant to several factors like harsh environmental factors, corrosion, etc. this corrosion resistance makes the fittings easy to clean and maintain.

​Stainless Steel Fittings: Stainless Steel is another material used in producing different system components and fittings. Stainless steel contains chromium, sulfur, nitrogen, copper, selenium, aluminium, silicon, nickel, and molybdenum. Some of the benefits of stainless steel in fittings are:
  • Resistance to Corrosion and Chemical Damage: Stainless steel contains a minimum of 11% chromium which makes it resistant to corrosion. It can also be exposed to chemicals without deformation or breaking risk. 
  • Easy availability: Stainless steel fittings are very flexible, and this makes them readily available in the market for purchase.

4. What items do you need before connecting tubes and fittings?

Before connecting fittings to tubes or pipes, you have to be adequately prepared for the process. More so, the components to be joined needs to be readily available and carefully chosen. Follow these steps to prepare your components:
SS316 Union Nut
SS316 Union Nut
​Step 1: Tubes
Before buying your tubes, you have to understand the need for compatibility of materials. Select the tubes with particular reference to working pressure, chemical composition, size, temperature range, etc. 

Step 2: Fittings
Select the preferred fitting configuration to use. Fittings are important components that decide the direction of flow according to their shapes. You can use union coupling, tee, 90D, elbow, or other fitting types.

Step 3: Tools
​
When choosing tools, you have to consider the outer diameter size of the tubes bought. The right tools will allow a quick and smooth installation process.

5. How to assemble DIN Fitting in the correct way?

For compression single ferrule DIN fittings, attention has to be placed on the assembly process as it dictates the effectiveness and performance of the fittings. Fortunately, the fittings are designed with a robust tube grip which makes the installation and disassembly process quite easy. Also, the fittings can work under high pressures, weather changes, and withstand vibration fatigue. 

With the right items in place already, follow the following steps for installation:

STEP 1
Place the cutting ring and nut over the tube in the right position 


STEP 2
Insert the tube in the pre-assembly tool reaching the tube abutment before using the nut to hand tighten the tubes.


STEP 3
Use a wrench to tighten 1 1/4 turns over the hand tightened position.


​STEP 4
Remove the pre-assembly and nut to see the formation of the ring over the tube. The ring formation happens as a result of the cutting ring penetration into the tube surface.


​STEP 5
​
Tighten the nut with a wrench whilst the fitting body is standing firmly. When a torque increase is observed, tighten the nut ¼ turn as the last step. However, note that the body shouldn’t be turned, only nuts.

COMPRESSION FITTINGS CATALOGUE

RFS Compression Fittings
File Size: 6859 kb
File Type: pdf
Download File

Eaton Compression Fittings
File Size: 12429 kb
File Type: pdf
Download File

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SS316 Weldable Bulkhead
SS316 Weldable Bulkhead
Bahasa Indonesia

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