Unifit Metalloys is a trusted flange manufacturer in Malaysia, supplying high-quality flanges to industries such as oil & gas, petrochemicals, power generation, marine, and water treatment. Our products are manufactured in compliance with ASME, ASTM, ANSI, DIN, EN, and JIS standards, ensuring precision, reliability, and corrosion resistance.
This comprehensive guide covers all major flange types, their specifications, materials, and full ASME B16.5 size & weight charts to help you select the right flange for your application.
As a trusted Flange Manufacturer in Malaysia, Unifit Metalloys delivers premium quality industrial flanges for global industries.
Types of Flanges from a Flange Manufacturer in Malaysia
- Weld Neck Flanges (WN)
- Slip-On Flanges (SO)
- Blind Flanges (BL)
- Socket Weld Flanges (SW)
- Threaded Flanges (TH)
- Lap Joint Flanges (LJ)
Top Quality Standards by Premier Flange Manufacturer in Malaysia
1. Weld Neck Flanges (WN)
Designed for high-pressure and high-temperature applications, weld neck flanges feature a long tapered hub that ensures smooth stress distribution.
Specifications
| Standard | Size Range | Pressure Class | Face Type |
|---|---|---|---|
| ASME B16.5 | ½” to 24” | 150 to 2500 | RF / RTJ |
| ASME B16.47 | 26” to 60” | 150 to 900 | RF / RTJ |
2. Slip-On Flanges (SO)
Easy to install and cost-effective, slip-on flanges are ideal for low to medium pressure piping systems.
Specifications
| Standard | Size Range | Pressure Class | Face Type |
|---|---|---|---|
| ASME B16.5 | ½” to 24” | 150 to 1500 | RF / FF |
| ASME B16.47 | 26” to 60” | 150 to 900 | RF / FF |
3. Blind Flanges (BL)
Used to seal the ends of piping systems or vessels, blind flanges provide easy access for inspection and maintenance.
Specifications
| Standard | Size Range | Pressure Class | Face Type |
|---|---|---|---|
| ASME B16.5 | ½” to 24” | 150 to 2500 | RF / RTJ |
| ASME B16.47 | 26” to 60” | 150 to 900 | RF / RTJ |
4. Socket Weld Flanges (SW)
Best suited for small-diameter, Socket Weld Flanges Used in high-pressure pipelines.
| Standard | Size Range | Pressure Class | Face Type |
|---|---|---|---|
| ASME B16.5 | ½” to 3” | 150 to 1500 | RF |
5. Threaded Flanges (TH)
Threaded flanges require no welding, making them ideal for low-pressure, non-critical connections.
| Standard | Size Range | Pressure Class | Face Type |
|---|---|---|---|
| ASME B16.5 | ½” to 4” | 150 to 1500 | RF / FF |
6. Lap Joint Flanges (LJ)
Commonly used with stub ends, lap joint flanges are ideal for systems requiring frequent dismantling.
| Standard | Size Range | Pressure Class | Face Type |
|---|---|---|---|
| ASME B16.5 | ½” to 24” | 150 to 900 | RF |
Materials Available
- Stainless Steel (SS304, SS316, SS316L, SS321)
- Carbon Steel (A105, A350 LF2)
- Alloy Steel (F5, F9, F11, F22)
- Duplex & Super Duplex (UNS S31803, UNS S32750)
Full ASME B16.5 Flange Weight Chart (Kg)
Below is a condensed version of our weight chart for Weld Neck, Slip-On, and Blind Flanges in different pressure ratings by Flange Manufacturer in Malaysia.
Class 150 Flanges
| NPS | Weld Neck | Slip-On | Blind |
|---|---|---|---|
| ½” | 0.9 | 0.7 | 1.1 |
| 1” | 1.3 | 1.0 | 1.6 |
| 2” | 2.6 | 2.1 | 3.2 |
| 4” | 6.8 | 5.8 | 8.7 |
| 8” | 21.7 | 18.5 | 27.4 |
| 12” | 47.6 | 41.0 | 56.8 |
Class 300 Flanges
| NPS | Weld Neck | Slip-On | Blind |
|---|---|---|---|
| ½” | 1.2 | 1.0 | 1.6 |
| 1” | 1.9 | 1.5 | 2.5 |
| 2” | 3.9 | 3.2 | 4.9 |
| 4” | 10.3 | 8.9 | 13.2 |
| 8” | 34.5 | 29.2 | 42.0 |
| 12” | 75.3 | 64.5 | 89.0 |
Class 600 Flanges
| NPS | Weld Neck | Slip-On | Blind |
|---|---|---|---|
| ½” | 1.8 | 1.5 | 2.4 |
| 1” | 3.0 | 2.6 | 4.1 |
| 2” | 6.4 | 5.6 | 8.7 |
| 4” | 17.5 | 15.0 | 22.5 |
| 8” | 59.5 | 52.0 | 70.2 |
| 12” | 128.0 | 115.0 | 145.3 |
Industrial Applications of Flanges in Malaysia
- Oil & Gas Pipelines – Offshore and onshore applications.
- Petrochemical Plants – Corrosion-resistant materials for chemical processing.
- Power Plants – High-strength flanges for steam and water systems.
- Water Treatment – Long-lasting flanges for water infrastructure.
- Shipbuilding & Marine – Duplex and stainless steel flanges for seawater exposure.
Why Choose a Flange Manufacturer in Malaysia?
At Unifit Metalloys, a premier Flange Manufacturer in Malaysia, we combine engineering expertise, advanced manufacturing, and strict quality control to deliver flanges that meet global standards. Whether you need a standard flange or a custom-engineered solution, we ensure precision, durability, and timely delivery.
Unifit Metalloys, a trusted Flange Manufacturer in Malaysia, supplies premium quality industrial flanges for diverse industries
FAQs
Q1: Do you export flanges from Malaysia?
Yes, we ship globally with full export documentation.
Q2: Can you manufacture custom flanges?
Absolutely, based on your drawings and specifications.
Q3: Which standards do you follow?
ASME, ASTM, ANSI, DIN, EN, and JIS.
Q4: What is your production lead time?
Typically 2–6 weeks depending on the order.
Q5: Do you provide Mill Test Certificates?
Yes, all our flanges are supplied with MTC as per EN 10204 3.1.