Slip On Flanges

Instinox specialises in manufacturing all kinds of flanges. Instinox manufactures slip on pipes in all steel material grades, including carbon pipe flanges, stainless steel slip on pipes and alloy slip on flanges.

Instinox also has many different slip on pipe flanges in stock and ready to ship. Our tubes/pipes fittings facilities are inclusive of many kinds of manufacturing equipment, processing lines and quality control devices, which makes sure that our products are of high quality level.

Instinox never faces the problem of non-availability of goods since it has one of the largest warehouses in the country. We provide high quality packing and premium quality packing for sea and air transport. In the history of last 15 years and counting we have registered less than v1% rejection rate on our supplies. We also provide customised orders as per our client’s requirements.

Slip on flange, as the name suggests, is a type of steel flange which slides over the end of the pipe and hen welded in pipes. Since the pipe slips into the flange before welding, pipe has a low hub.
The inside diameter and outside diameter of the flange are both welded, resulting in sufficient strength and no leak. Slip on flanges can be easily fitted into different pipes. Slip on flanges are most suited for lower pressure applications. These attachments are connected to the pipe via fillet weld at the top and bottom of the flange. Slip-on flanges are provided with a raised or flat face. When raised face is necessary for slip on the pipe flanges, the standard height is 1/6th for slip on pipe flanges.

Slip on flanges or SO flanges are usually lower in price than other flanges a=such as socket weld flanges or weld neck flanges. This makes it a popular choice for many customers. However customers should bear in mind that this initial cost savings may be reduced by additional cost of two more fillet welds required for proper installation. Also, based on higher life expectancy, weld neck flanges and socket weld flanges have a higher life expectancy than slip on flanges under duress.

• Low cost installation
• Less time spent on ensuring the accuracy of the cut pipe
• Easier to align
• Low hub because pipe slips into the flange before welding
• Flange is welded from both the inside and the inside to provide sufficient strength
• Prevents leakage

• One size fits all pipes
• Fabricators can more easily cut the pipe to length for slip-on flanges.
• The smaller thickness of this flange allows for easier alignment of bolting holes.
• They are generally not preferred for high-pressure temperature environments.

• Stainless steel
• Aluminum
• Silicone
• Cast Iron
• Titanium
• Bronze
• Brass
• Nickel alloy
• PVC etc.
• Polypropylene
• Nickel alloy
• Carbon steel

The manufacturing process includes six major steps namely:

• Cutting
• Open and Closed Die Forging
• Heat Treatment
• Conventional and CNC Machining
• Inspection and Quality Check
• Packing and Dispatch

Steam hammer technology is used for our manufacture of forging products. It is based on open die forgings and drop hammer closed die forgings. Visual and dimensional checking of raw material is done when after steel is received from the manufacturer. The stocks of SS and CS material are kept separately for fast access and simple distinction. The colour coding scheme to every unit of raw material is applied as per the colour code. The colour coding scheme assists to footmark the material during the manufacturing process. The criterion test certificate which is received from suppliers for raw material is studied. Then, physical and chemical testing of each material is done. The various types of raw material are given lot no. and details such as source of supply heat number, supplier’s certificate number, or a lot number of the company are decided. Internal Granule Corrosion testing and ultrasonic testing is done. Cutting and marking the materials are stamped with lot number for identity proof. The manufacturing division raises appropriation test for material the company want to use in their process. The material is issued symbolizing the lot number. The required material’s length and weight are verified. The raw materials, which are in shape of long rods of different diameters, are chopped with the use of huge saw cutting machines. A QC and inspection test is done to overview the flanges. Lastly, the flanges are assorted and packed for dispatch.

At Instinox, all fittings and flanges are subject to strict inspection and quality checks at all stages of the manufacturing process, from starting material purchasing to product shipment. They are optically inspected for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. At Our requests, officially certified agencies are called to witness the material reports, dimension and quality conformity of products.

Test Certificates are given to the manufacturer after third party inspection under the standards: EN 10204/3.1B, Raw materials Certificate, 100% Radiology Test report Test Certificate.

All products are given brand marking and heat number traceability and marked with Grade, lot no. , size, degree, and our firm’s trade mark for identification purpose. Products are also packaged to ensure that there is no damage during transit. Standard export packaging is done in wooden cases in case of exports. We also make customized orders as per our client’s requests.

• Turnkey projects
• Pharmaceutical projects
• Paper mills
• Waste water treatment plants
• Oil refineries
• Petrochemical plants
• Power generation
• Shipbuilding industries
• Machining companies