A flange is type of fitting used to connect pipes, valves, pumps and other equipment to form a piping system. A flanged joint involves three separate components; the flanges, the gaskets, and the bolting. One of the most important advantage of using a flange is that it allows more flexibility in maintenance.

The various types of flanges include: Weld neck Flanges (WNRF), Slip-on Flanges (SORF), Blind Flanges (BLRF), Lap Joint Flanges, (SOLJ), Socket-weld Flanges (SWRF), Screwed (Threaded) Flanges, Long weld neck Flanges (LWNRF), Spectacle Blind Flanges, Spacer & Blind Flanges, Ring Type Joint Flanges (RTJ), Reducing Flanges, Raised Face (RF) Flanges, Orifice Flanges, Large Diameter Flanges, Custom Flanges, Drawing Flanges, Forged Flanges, Plate Flanges, Flat Face Flanges, etc.

Standards & Specifications for Manufacturing Flanges

• ASME B16.5 (Pipe Flange)
• A403/A403M (Wrought Austenitic Stainless Steel Piping Fittings)
• A182/A182M (Alloy Steel Forgings for high-Temperature)
• A105/A105M (Carbon Steel Forgings for Piping)
• A234/A234M (Piping Fittings of Carbon Steel and Alloy Steel for Moderate and High Temperature)
• A350/A350M (Carbon Steel and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing)

What are the Main Flange Manufacturing Grades?

Stainless steel 304(SS304) is the most basic stainless steel known as 18-8 grade with higher chromium and low carbon content. The low carbon content restricts carbide precipitation during welding as well as minimizes its susceptibility to intergranular corrosion. Stainless steel 304L(SS304L) is an extra low-carbon variation of SS304 with a 0.03% maximum carbon content that eliminates carbide precipitation due to welding. Both SS304 and SS304L have excellent resistance to a wide range of atmospheric, chemical and petrochemical, and food industry corrosions. Usually, they can be used in applications with the maximum temperature of 1650°F[900°C] exhibiting good oxidation resistance.

304L alloy’s lower carbon content helps minimize/eliminate carbide precipitation during the welding process. This allows 304L stainless steel to be used in the “as-welded” state, even in severe corrosive environments.

If you were to use standard 304 stainless in the same way, it would degrade much faster at the weld joints.

Basically, using 304L eliminates the need to anneal weld joints prior to using the completed metal form—saving time and effort.

In practice, both 304 and 304L can be used for many of the same applications. The differences are often minor enough that one isn’t considered massively more useful over the other. When stronger corrosion resistance is needed, other alloys, such as grade 316 stainless steel, are usually considered as an alternative.

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose

• Off-Shore Oil Drilling Companies
• Power Generation
• Petrochemicals
• Gas Processing
• Specialty Chemicals
• Pharmaceuticals
• Pharmaceutical Equipment
• Chemical Equipment
• Sea Water Equipment
• Heat Exchangers
• Condensers
• Pulp and Paper Industry

SS 304 Flange Suppliers, Stainless Steel 304 Flange Manufacturers, A182 F304 Flange Manufacturers, UNS S30403 Seamless Pipe Factory, SS 304L Flange Manufacturers, SS 304 Weld neck Flanges (WNRF), SS 304 Slip-on Flanges (SORF), SS 304 Blind Flanges (BLRF), SS 304 Lap Joint Flanges, (SOLJ), SS 304 Socket-weld Flanges (SWRF), SS 304 Screwed (Threaded) Flanges, SS 304 Long weld neck Flanges (LWNRF), SS 304 Spectacle Blind Flanges, SS 304 Spacer & Blind Flanges, SS 304 Ring Type Joint Flanges (RTJ), SS 304 Reducing Flanges, SS 304 Raised Face (RF) Flanges, SS 304 Orifice Flanges, SS 304 Large Diameter Flanges, SS 304 Custom Flanges, SS 304 Custom Drawing Flanges, SS 304 Forged Flanges, SS 304 Plate Flanges, SS 304 Flat Face Flanges