Large Diameter Flanges

Specifications include a wide range of sizes, material thicknesses, and pressure ratings
Grades and Specifications
- MS Flanges (HSN Code: (730721),(73079190) in various grades such as IS 2062, ASTM A105, ASTM A36,ASTM A106,E 350 C,EN1092
- MS Circles (HSN Code: (720851),(73079190) in IS 2062, ASTM A36.
- MS Plates (HSN Code: (720851),(73079190) available in IS 2062, ASTM A3.
- 73072100: Pipe Fittings of Iron or Steel- 73079300: Carbon Steel Butt-Weld� Fittings
Grades of CS Flanges:
ASTM A105: Forged carbon steel.
ASTM A350 LF2: Low-temperature applications.
ASTM A516 Gr. 70: Pressure vessels.
ASTM A694: High-pressure use.
HSN Code:
7307.21: Flanges of iron/steel (non-stainless).
7307.29: Other pipe fittings of iron/steel.

Types of Flanges by M.R.A.C Steel Product
Slip-On Flanges
Commonly used for low-pressure applications. Easy to install and cost-effective.
Weld Neck Flanges
Ideal for high-pressure applications. Provides excellent structural integrity.
Blind Flanges
Used to seal off pipelines or create a stop. Designed for safety and reliability.
Socket� Weld Flanges
Suitable for small pipes and high-pressure systems. Ensures secure welding.
Lap Joint Flanges
Best for applications requiring frequent disassembly. Used with stub ends.
Threaded Flanges
Quick installation without welding. Suitable for small pipe sizes.
Spectacle Blinds
Two-in-one design for stopping flow or allowing it. Easy to use for maintenance.
Reducing Flanges
Designed for connecting pipes of different diameters. Ensures smooth flow.
Industries Served

*WE ALSO MANUFACTURE MATERIAL AS PER CUSTOMER REQUIRMENTS*

S355NL A105 Customized Large Flange

Normalizing + Machined As Per Drawings

This division is leading manufacturer and stockist of Flanges. This flanges are manufactured and supplied in different a range of pressure ratings and sizes and with different specification to meet customer requirement. This flanges to be used in industries like pipeline engineering, oil and gas industry, mechanical and plant engineering, marine industry, waste water management, chemical industry, petrochemical industry, power industry, aerospace, food processing and many more.

Industrial Steel Flanges, Manufactured as per ANSI B 16.5 / DIN / JIS – Stainless Steel Flanges, Carbon Steel Flanges, Alloy Steel Flanges.

Product Details
Flange Stock/Manufacturing Range: (ANSI / ASME Flanges)
Size Range : ½" (15 NB) to 48" (1200 NB)

Standards : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API 605, AWWA, Custom Drawings.

Pressure Ratings : Class 150, Class 300, Class 400, Class 600, Class 900, Class 1500, Class 2500 PN6, PN10, PN16, PN25, PN40, PN64 Etc.

Type of Flanges : 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.

Flange Face Type : Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Coating /Surface Treatment : Anti-Rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized

Special Requirement : With such a vast experience and expertise, other special large diameter flanges can also be supplied on customer demand.

ASME B16.47 is an American Society of Mechanical Engineers (ASME) standard that specifies the dimensions, materials, and tolerances for large diameter steel pipe flanges. The standard covers flanges with nominal pipe sizes (NPS) from 26 to 60 and pressure class ratings from 75 to 900.

ASME B16.47 flanges are divided into two series: Series A and Series B. Series A flanges are based on the MSS SP-44 standard, while Series B flanges are based on the API 605 standard. The main difference between the two series is that Series A flanges have a larger bolt circle diameter than Series B flanges.

ASME B16.47 flanges are typically used in high-pressure and high-temperature applications, such as in the oil and gas industry. They are also used in other industries, such as the chemical, power, and water treatment industries.

Here are some of the key features of ASME B16.47 flanges:
They are made of steel, cast iron, or stainless steel.
They have a raised or flat face.
They have a bolt circle diameter that ranges from 125 to 600 millimetres.
They have a pressure class rating that ranges from 75 to 900.
They have a thickness that ranges from 6.3 to 127 millimetres.

ASME B16.47 flanges are an important part of many piping systems. They help to ensure the safe and reliable operation of these systems.

Miniature ball bearing: The bore diameter is 2-15mm. chrome steel, stainless steel, Ceramic.

A split flange is a type of flange that can be easily installed on pre-existing piping. It is made up of two interlocking pieces that fit securely together using nuts and bolts or welding it into place. Because it is made of two parts, split flanges are used to reinforce weakened areas of piping, or to add an attachment in places conventional flanges cannot.

Split-flange fittings use rubber O-rings to seal joints and contain pressurized fluid. The O-ring sits in a groove on the flange, and then mates with a port's flat surface. The flange is then attached to the port with four mounting bolts. The bolts tighten downward onto the clamps of the flange, thereby eliminating the need for large wrenches to connect the components of large-diameter tubing.

ANSI flanges facilitate the alignment of the bolt holes between the two mating flanges, a feature that is helpful in many circumstances, such as the installation of large diameter pipelines, subsea and offshore pipelines, pipe works in shallow waters and similar environments.

ANSI flanges suit oil, gas, hydrocarbons, water, chemical and other demanding fluids in petrochemical and water management applications.

In the case of a large diameter pipeline, for instance, the pipe is fitted, at one end, with a standard welding neck flange, and with a swivel flange at the other end: by simply rotating the swivel flange on the pipe, the operators can achieve a perfect alignment of the bolt holes in a way easier and faster way

A slip-on flange is connected to the pipe or the fittings by two fillet welds, one executed inside and one outside the cavity of the flange.

The bore size of a slip-on flange is larger than the outside diameter of the connecting pipe, as the pipe has to slide inside the flange to be connected by the execution of a fillet weld.

Slip-on flanges are also defined Hubbed Flanges and they are easy to recognize due to their slim and compact shape.

Screwed flange are often used for small diameter, high pressure requirements. Screwed flanges with a hub have published specifications that range from 1/2 thru 24. Pressure class: Class 150 to Class 2,500, PN 2.5 to PN 250 and Facing: RF / RTJ. Screwed flanges are threaded in the bore which match an external thread on the pipe. Screwed flanges are used with pipes that have external threads. The benefit of these flanges is that it can be attached without welding.