ASME B16.5 Flange Class 150 WN Flange

Alloy Steel: ASTM A182 F11 / 12 / 5 / 9 / 91 / 92
Stainless Steel: ASTM A182 F304/304L/304H, 316/316L, 321, 310S, 317,347,904L, 1.4404, 1.4437.

These pipe flanges are attached by inserting the pipe into the socket end and applying fillet weld around the top. This allows for a smooth bore and better flow of the fluid or gas inside of the pipe. The connection with the pipe is done with 1 fillet weld, at the outside of the flange. But before welding, a space must be created between flange or fitting and pipe.

Reducing pipe (reducing nipple) is a pipe fitting used for straight-line connection of two pipes with different sizes to realize pipe diameter reduction. There are concentric reducing joints and eccentric reducing joints

Slip on flange, also called SO flange. It’s a kind of flange slides over the pipe with internal design is slightly larger than the pipe. Since the inner diameter of the flange is slightly larger than the outer diameter of the pipe, the SO flange can be directly connected to equipment or pipe by fillet weld at the top and bottom of the flange. It is used to insert the pipe into the inner hole of the flange.

Socket weld (SW) flange is a type of forged flanges,these flanges can socket and wedled with pipes,you could find the flanges specifications in the content below.Stainless steel flanges are popular because the stainless steel has great corrosion resistance so that these flanges can used in some corrosive environments.

The specification of ASTM A182 Forged Pipe Fittings includes forged fittings, stainless steel, rolled alloy, forged alloy, pipe flanges as well as high-temperature service. Later then forgings and hot working, it would be cooled down to a certain temperature before heat treatment.
The Alloy Steel A182 Threaded Elbow material grade contains ASTM A182 F11 / 12 / 5 / 9 / 91 / 92 / 22.

A234 WPB blind flange is a type of flange widely used in pipeline systems. A234 is the standard number of the American Society for Testing and Materials (ASTM), and WPB indicates that this material is a carbon steel pipeline component for medium and low temperatures.

Class 150 WN flange is the lowest pressure flange in all the flanges,langes also have many pressures:CL300, CL600, CL900, CL1500, CL2500.ASTM A105 is the matal standard for forged flanges and fittings.

What is a Weld Neck Flange and its 2 different shapes

Usage of a weld neck flange

An assembly with limited space may be an instance in which a socket weld is selected, provided the pressure class is comparatively low and the fluid is not corrosive or for extremely high temperature service.

Classification of weld neck flange

Carbon Steel: ASTM A105 / A105N, ASTM A350 LF2/LF3, ASTM A694 F42 / 46 / 56 / 60 / 65, P235GH, P265GH, P280GH, P355GH
Alloy Steel: ASTM A182 F11 / 12 / 5 / 9 / 91 / 92
Stainless Steel: ASTM A182 F304/304L/304H, 316/316L, 321, 310S, 317,347,904L， 1.4404, 1.4437.
Duplex Stainless Steel: ASTM A182 F51, F53, F44

The common material grade of stainless steel ASTM A182 contains F304/304L/304H, 316/316L, 321, 310S, 317,347,904L， 1.4404, 1.4437.

Face Type of a WELD NECK flange

Forged Steel Flange are attached by inserting the pipe into the socket end and applying fillet weld around the top. This allows for a smooth bore and better flow of the fluid or gas inside of the pipe.

It is used to insert the pipe into the inner hole of flange, as the flange inner diameter is little bigger than the pipe’s outer diameter, pipe and flange could be connected by lap welding at the top and bottom of the flange. The slip-on flange is a simple and excellent alternative to a weld neck as it does not have a weld bevel, and therefore allows the pipe to be adjusted in length relative to its position of the flange.

Common material grade for stainless steel flange: ASTM A182 F304/304L/304H, 316/316L, 321, 310S, 317,347,904L， 1.4404, 1.4437.

300LB SO flanges is a commonly used pressure of flanges,all flanges could be 150LB,300LB,600LB,900LB,1500LB,2500LB.Stainless steel forged flanges are always used in chemical environment because of the great anti-corrosive function.The most popular stainless steel grades are A182 F304/304L and A182 F316/316L.

ASTM A350 LF2 Blind Flange is a common low-temperature carbon steel material, mainly used in the manufacture of low-temperature and high-pressure forged pipe fittings and flanges.

Stainless steel flange, also called SS flange, it means the material of flange is stainless steel. Common material standards and Grades are ASTM A182 Grade F304/L and F316/L, with pressure ratings from Class 150, 300, 600 etc and to 2500.

Material Grade: ASTM A182 F304/304L/304H, 316/316L, 321, 310S, 317,347,904L， 1.4404, 1.4437.

ASTM A105 Forged Fittings 300# WN Flange
Size Range: 1/2″ – 48″/ DN15 – DN1200
Rressure rating: Class 150, 300, 600, 900, 1500, 2500lb

Threaded flange is a non-welded flange that is made by processing the inner hole of the flange into pipe threads and matching with the threaded pipe to achieve connection. The connection method is to match the inner hole of the flange with the thread on the pipe, and then rotate and connect them together.

What is a Weld Neck(WN) Flange and what about its specification and advantages.

ASTM A105 threaded fittings is commonly used carbon steel grade which is used to manufacture forge piping components such as forged fittings and flange of small diameter piping, generally for piping whose nominal diameter is NPS 2 or smaller.

A weld neck flange, also called a tapered hub flange or high-hub flange, is a kind of flange that can relocate stress to the pipes, ensuring a decrease in high-stress concentration at the bottom of the flange.

This allows for a smooth bore and better flow of the fluid or gas inside of the pipe. The connection with the pipe is done with 1 fillet weld, at the outside of the flange. But before welding, a space must be created between flange or fitting and pipe.