Types of Flanges

Threaded Flanges

Threaded flanges, also known as screwed flanges, are a type of pipe flange designed to be connected to piping systems without the need for welding. Instead of welding, the internal bore of the flange is threaded, allowing it to be screwed directly onto a pipe with matching external threads. This makes installation and removal easy, especially in systems where welding is not feasible or safe, such as in explosive environments. Threaded flanges are typically used in low-pressure and non-cyclic applications, and they are commonly found in industries like plumbing, water treatment, and oil and gas. They are made from materials such as carbon steel, stainless steel, and alloy steel, and are available in various pressure ratings (usually up to Class 600).

Threaded Flange, Threaded Forged Flanges, Screwed Flanges Production Range

Marking & Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All elbow fittings are marked with Grade, Lot No, Size, Degree, and our trademark. On special requests, we can also make custom marking on our products.

Quality Assurance

All fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions, and quality conformity of products.

Test Certificates

Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report.

Weldneck Flanges

Weld neck flanges are high-strength pipe flanges designed for use in high-pressure and high-temperature applications. They are easily identified by their long tapered hub, which gradually transitions from the flange thickness to the pipe wall thickness. This design provides excellent stress distribution and reduces the risk of flange failure under heavy loads or fluctuating pressure conditions. Weld neck flanges are butt-welded to the pipe, creating a strong, leak-proof joint that is ideal for critical piping systems in industries such as oil and gas, petrochemical, power generation, and shipbuilding.

Welding Neck Flange, WN Forged Flanges, Weld Neck Flanges Production Range

Marking & Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All elbow fittings are marked with Grade, Lot No, Size, Degree, and our trademark. On special requests, we can also provide custom marking on our products.

Quality Assurance

All fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified inspection agencies can be called in to witness the material reports, dimensions, and quality conformity of products.

Test Certificates

Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, and Third Party Inspection Report.

Slip On Flanges

Slip-on flanges are a type of pipe flange designed to slide over the end of a pipe and then be welded in place, both inside and outside, to provide a secure, leak-proof connection. They are widely used in low to moderate pressure and temperature applications due to their ease of alignment and installation. Slip-on flanges have a low-profile design and are slightly larger in diameter than the pipe, which allows for easy fitting and welding. These flanges are typically used in systems where welding is required but where stress on the flange is relatively low, such as in cooling water, firefighting lines, and low-pressure pipelines in the oil, gas, and chemical industries.

Slip-on Flange, SO Forged Flanges Production Range

Marking & Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All elbow fittings are marked with Grade, Lot No, Size, Degree, and our trademark. On special requests, we can also make custom marking on our products.

Quality Assurance

All fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions, and quality conformity of products.

Test Certificates

Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report.

Socket Weld Flanges

Socket weld flanges are a type of pipe flange designed for use with small-diameter, high-pressure piping systems. They feature a recessed area (or socket) into which the pipe is inserted before being welded around the outer edge, creating a strong and leak-resistant joint. This design ensures proper alignment and smooth flow, making socket weld flanges ideal for pipelines where cleanliness and structural integrity are important. Commonly used in chemical processing, oil and gas, and power generation industries, these flanges are especially suitable for applications involving high pressure and limited space.

Socket Weld Flange, Production Range

Marking & Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All elbow fittings are marked with Grade, Lot No, Size, Degree, and our trademark. On special requests, we can also make custom marking on our products.

Quality Assurance

All fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions, and quality conformity of products.

Test Certificates

Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report.

Blind Flanges

Blind flanges are solid, round plates used to close the ends of piping systems, valves, or pressure vessel openings. Unlike other types of flanges, blind flanges have no center hole, making them ideal for isolating sections of a pipeline or sealing off unused nozzles. They are typically bolted to a matching flange and sealed with a gasket to ensure a leak-proof closure. Blind flanges are commonly used in high-pressure and high-temperature applications across industries such as oil and gas, petrochemical, power generation, and water treatment. Available in a variety of materials—such as carbon steel, stainless steel, and alloy steel—they can withstand harsh environments and demanding conditions.

Blind Flanges, BL Forged Flanges Production Range

Quality Assurance

All fittings and flanges undergo rigorous inspection at each stage of the production process, from material procurement to final dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, certified inspection agencies can be engaged to verify material reports, dimensions, and overall quality compliance.

Technical Specifications – Blind Flanges

Below are the specifications for ANSI/ASME B16.5 and B16.47 Series A & B Blind Flanges. Dimensions are in inches; weights are in pounds.

• ANSI/ASME B16.5 Blind Flange 150lb
• ANSI/ASME B16.5 Blind Flange 300lb
• ANSI/ASME B16.5 Blind Flange 400lb
• ANSI/ASME B16.5 Blind Flange 600lb
• ANSI/ASME B16.5 Blind Flange 900lb
• ANSI/ASME B16.5 Blind Flange 1500lb
• ANSI/ASME B16.5 Blind Flange 2500lb
• ANSI/ASME B16.47 Series B Blind Flange 75lb
• ANSI/ASME B16.47 Series B Blind Flange 150lb
• ANSI/ASME B16.47 Series B Blind Flange 300lb
• ANSI/ASME B16.47 Series B Blind Flange 400lb
• ANSI/ASME B16.47 Series B Blind Flange 600lb
• ANSI/ASME B16.47 Series B Blind Flange 900lb
• ANSI/ASME B16.47 Series A (MSS SP44) Blind Flange 150lb
• ANSI/ASME B16.47 Series A (MSS SP44) Blind Flange 300lb
• ANSI/ASME B16.47 Series A (MSS SP44) Blind Flange 400lb
• ANSI/ASME B16.47 Series A (MSS SP44) Blind Flange 600lb
• ANSI/ASME B16.47 Series A (MSS SP44) Blind Flange 900lb

Marking & Packing

Products are securely packaged to avoid damage during transit. For exports, we use standard wooden cases. All elbow fittings are clearly marked with Grade, Lot Number, Size, Degree, and our trademark. Custom marking options are available upon request.

Quality Assurance

All fittings and flanges undergo rigorous inspection at every stage of production—from raw material procurement to dispatch. Each item is visually examined to ensure compliance with ASTM, ASME, MSS, DIN, EN, and JIS standards. Certified inspection agencies can be requested to verify material reports, dimensions, and overall quality conformity.

Lap Joint Flanges

Lap Joint Flanges (LJFs) are specialized components in piping systems, comprising two parts: a stub end welded to the pipe and a loose backing flange that slides over the stub end. This design allows the flange to rotate, facilitating easy alignment of bolt holes and simplifying installation and maintenance processes. LJFs are particularly beneficial in applications requiring frequent disassembly, such as in chemical processing plants, food and pharmaceutical industries, and marine environments. They offer advantages like cost-effectiveness, ease of alignment, and suitability for corrosive environments. However, they are generally not recommended for high-pressure applications due to their design limitations.

LAP JOINT FLANGES, LJ FORGED FLANGES PRODUCTION RANGE

Quality Assurance

All fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified inspection agencies can be called in to witness the material reports, dimensions, and quality conformity of products.

Marking & Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All elbow fittings are marked with Grade, Lot No, Size, Degree, and our trademark. On special requests, we can also make custom marking on our products.

Test Certificates

Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report.

Technical Information – Specifications, Dimensions Plate Flanges

• ANSI/ASME B16.5 Plate Flange 150lb
• ANSI/ASME B16.5 Plate Flange 300lb
• ANSI/ASME B16.5 Plate Flange 400lb
• ANSI/ASME B16.5 Plate Flange 600lb
• ANSI/ASME B16.5 Plate Flange 900lb
• ANSI/ASME B16.5 Plate Flange 1500lb
• ANSI/ASME B16.5 Plate Flange 2500lb

Plate Flanges

Plate flanges—also known as flat or plate-type flanges—are flat, circular disks with a central bore and bolting holes, machined from a steel plate rather than forged They offer dependable, cost-effective connections in piping systems, making installation, inspection, and maintenance straightforward—especially suitable for low- to medium-pressure applications across industries like water treatment, HVAC, oil and gas, and general industrial use. Plate flanges provide strong, leak-resistant joints with gasketed bolting, and are available in various materials such as carbon steel, stainless steel, and alloy steel to match specific environmental and application needs

PLATE FLANGE, SLIP-ON PLATE FLANGES PRODUCTION RANGE

Marking & Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All elbow fittings are marked with Grade, Lot No, Size, Degree, and our trademark. On special requests, we can also provide custom marking on our products.

Quality Assurance

All fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified inspection agencies can be called in to witness the material reports, dimensions, and quality conformity of products.

Test Certificates

Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, and Third Party Inspection Report.

Technical Information – Specifications, Dimensions Plate Flanges

• ANSI/ASME B16.5 Plate Flange 150lb
• ANSI/ASME B16.5 Plate Flange 300lb
• ANSI/ASME B16.5 Plate Flange 400lb
• ANSI/ASME B16.5 Plate Flange 600lb
• ANSI/ASME B16.5 Plate Flange 900lb
• ANSI/ASME B16.5 Plate Flange 1500lb
• ANSI/ASME B16.5 Plate Flange 2500lb