Flange Manufacturer in India Pipe Fittings Manufacturer Carbon Steel Elbow

Flange manufacturer in India

What is flange?

A flange is a collar, solid disk, or ring that attaches different piping equipment. These flanges play a pivotal role in allowing or restricting the flow of fluids and gases in the system. A flange is installed in the system by welding it directly to the module; however, they can be also threaded or lap-jointed for specific applications.
A flange connection is materialized by drilling equally spaced bolt holes that align it to the subsequent machining flange. Both these components are fastened, making use of bolts. The bolt patterns can be determined by industry specifications or customer requirements. Standard flanges are manufactured following industrial specifications set by the ASME B16.47, ANSI B16.5, API, MS-SP44, and AWWA-C207. These versatile modules are designed with pressure ratings from 75# up to 2500#.

There are different types of flanges Manufactured By Petromet Flange Inc Such as:

  • Weld neck flange
  • Lap-joint flange
  • Blind flange
  • Threaded flange
  • Socket-weld flange
  • Orifice flange
  • Slip-on flange

All these flange types can be custom designed with our innovative technology and latest equipment to meet complete customer satisfaction.


Flange manufacturer in India

Steel Forging supplier

How do you define steel pipe flanges size?

Flanges are designed in different sizes to meet different requirements. The key sizes of flanges are:

  • The nominal size is the bore size of the flange matching it to the size of the bore to the connecting pipe.
  • The schedules designated to weld the flanges to subsequent piping modules.
  • The flange pressure and temperature rating determine the size of the pipe.
Forged flange

What is difference between forged flange, plate flange and cast flange?

Forged flange- Forging of steel is a process that makes use of mechanical and thermal energy for producing steel billets and ingots, allowing the items to be shaped precisely. The high-strength flanges are utilized in high-pressure and temperature systems and have a consistent composition and grain structure. The costs of these flanges are higher due to the complex processing costs.

Plat flange- These flanges can be manufactured either by casting or forging the steel grade. The flat circular flanges are not preferred in high-pressure and temperature systems. These flanges possess a superior grain structure over standard forged or cast flanges. The cost of the flange depends on the processing type.

Cast flange- Casting is a process wherein metal is heated until it is molted and then poured into molds to get desired shapes. They don’t possess a uniform grain structure and may have defects in their formation. The flanges in this range are susceptible to high temperatures. They are, however, cheap to manufacture and process.

Petromet Flange Inc is Manufacturer of Forged flanges in India according to American and European standards ASTM, ASME, UNS, EN, and DIN

Eil approved flanges vs mr0175 nace flange

EIL approved flanges vs mr0175 nace flange

Eil approved flanges, and mr0175 nace flange are standard specifications of high-pressure and temperature flanges. Petromet Flange Inc is Stocking and Supplying These Eil and mr0175 nace Approved Flanges

  • Eil approved flanges is an Engineers India Limited corporation set by the Indian government. The mr0175 nace flange is a standard designated by the National Association of Corrosion Engineers.
  • Eil approved flanges cover the requirements of petroleum and natural gas. The mr0175 nace flange is a material standard for H2S conditions, which are designed to have equipment of oil and gas production systems.
  • Eil standards provide business consultancy service, while nace standards lay down standards for working in hydrogen-induced corrosive media across stress-induced systems.

Flat face flange vs raised face flange

Flat face flange vs raised face flange

Standard flanges are designed with a raised and flat face. Both these face types can be differentiated based on different characteristics.

  • A raised face flange is designed with a raised face and is a common feature in process plant applications. The gasket surfaces on these flanges are raised above the area of the bolting face area. This allows them to be used with different gaskets to securely seal the flange by concentrating more pressure to increase the pressure containment in the joint. The higher the face greater is its pressure containment.
  • In a flat face flange, the gasket area and the bolting circle face are on the same plane. These flanges are generally preferred with mating flanges. They can be utilized with only specific types of gaskets in moderate to low-pressure systems.

IBR, ADNOC, KOC, KNPC, PDO, and EIL Approved manufacturer of Pipe Flanges

What is Korean Flange?

Korean flange is a standard of steel that is manufactured by following the KS D Korean standard. The standard of these flanges is slightly similar to the Japanese JIS standard. The flanges in this standard are SORF, WNFR, BLFF, BLRF, and SOFF. The flanges in this grade possess a pressure rating of 5k, 10k, 16k, 20k, 30k, 43k, and 63k. These flanges are a feature in nuclear power plants, petrochemicals industries, acid production systems, and oil refineries.

Korean Flange

Products Supplied By Petromet Flange Inc

Forged Flanges

Forged Flanges

Pipe Flanges

Pipe Flanges

Nace Flange mr0175

Nace Flange mr0175

Flat face Flanges

Flat face Flanges

Raised face Flange

Raised face Flange

ADNOC Approved Flanges

ADNOC Approved Flanges

Petromet Flange Inc is ISO certified steel casting company in India produce Nace Flange mr0175 and Korean Flanges ks b 1503 for Sour Service and Petrochemical industry

ANSI Flanges vs ASME Flanges

ANSI and ASME flanges belong to important organizations of the metal industry. Understanding the difference between both these standards will help in selecting the correct equipment that adheres to specific standards

  • ANSI or American National Standard Institute are standards that are developed by specific organizations. ASME or the American Society of Mechanical Engineers is based on standards and codes for different mechanical devices.
  • ASME standards are based on and manufactured around 600 codes of standard mechanical devices. ANSI is based around approximately 9500 standards.
  • ANSI focuses on different products and services, while ASME focuses primarily on pressure vessels and boiler grades.
  • ANSI is focused on improving the position of the USA in global markets. The main focus of ASME is to develop solutions for different mechanical problems and safety issues.
  • ASME was founded long before ANSI standards were formulated

1/2 Inch to 24 Inch Flat face and Raised face Flange manufacturer and Exporter in Mumbai

Flange Inspection and Test Plan

Flanges are common equipment in connecting different piping equipment. Most often, they’re exposed to corrosive media and may degrade over time. To ensure the best products are supplied the purchaser can run inspections before finalizing the purchase.

Below are important inspection and test codes.

  • Code H or hold point- This code implies that production activities cannot proceed until it is permitted by the purchaser. Notification is required to ensure optimum functionality.
  • Code W or witness point- Here, the purchaser intends to see the relevant inspection feature. If the purchaser doesn’t want to witness the feature, the notification will allow the production to continue.
  • Code S or witness point- This code infers that the purchaser can inspect based on spot checks. It is a type of random inspection not requiring notification.
  • Code R or review- Inspection and test records are reviewed. Here the ITP is reviewed based on specified manufacturing codes and purchase order specifications. It is helpful if three more columns are added above the ITP to determine the construction standard, acceptance criteria, and verifying the documents.


The inspection and test plan can also be changed based on the purchase order or classes listed below.

  • Class A- Mandatory presence during fabrication with above 50% of a part formed inspected in the batch. (Min one piece). This is common for special flanges, low alloy, and stainless steel flange designed with pressure classes of up to 1500 or more.
  • Class B- Optional presence during fabrication with 25% to 60% parts formed in the batch to be inspected (Min one piece). This is common in carbon steel, low alloy, stainless steel, and special flanges with pressure classes of less or equal to 1500 with sizes less than 10mm.
  • Class C- Random inspection of 10-25% of the parts (Min one piece). This is common for carbon steel, low alloy, and stainless steel flange designed with pressure class of up to 1500 or more with lengths equal to or above 10mm
  • Class D- 0-10% of random inspection of the parts formed (Min one piece). This is common for carbon steel flanges with pressure class and sizes above 1500 and 10mm, respectively.