Collars are typically manufactured from a variety of materials, including steel and PVC, though stainless steel is the most commonly used. Alloy grades like 304 and 316, including marine-grade variants, are particularly popular for Collar Flanges due to their wide availability and suitability across multiple industries.
A collar functions to connect a flange to a pipe, playing a key role in forming a compact, versatile flange assembly. When integrated into piping systems, a Plain Collar Flange provides a reliable, leak-proof seal, preventing the escape of gases or liquids. These flanges are often used in systems that connect using pressed flanges, a method favored in industries such as Oil & Gas, Water Purification, Chemical, and Petrochemical, where secure, fitted connections are essential.
For an optimized connection between piping systems and a pressed flange, a sealing gasket is placed between the two DIN 11864-2 Pressed Collar Flanges. As the bolts are tightened, the gasket absorbs the stress from the collars, ensuring a snug fit. Stainless steel Collar Flanges in grades 304 and 316 are highly preferred due to their excellent mechanical properties and moderate to high corrosion resistance, with grade 316 offering superior corrosion resistance compared to grade 304.
Standard Specification Of Collar Flange
| Material | Mild Steel |
| Grade | MS FLANGE |
| Surface Finish | Polished, Galvanised, Powder Coated |
| Application | Automobile Industry, Oil & Gas Industry, Construction, Pharmaceutical / Chemical Industry |
| Minimum Size | 1/4 inch |
| Standards | ASTM A 335, ASME SA 335, ANSI B36.10 |
| Maximum Size | 24 inch |
| Flanges Face Type | Small Tongue, Lap-Joint Face, Raised Face, Ring Type Joint, Flat Face, Large Male-Female, Small Male-Female, Large Tongue & Groove Flanges manufacturer and Supplier |
|---|---|
| Flanges Marking | All Flanges are marked as follows: Supplier or Manufacturer’s Name, Size, Class, Bore, Dimension, Material, Heat No. Or according to the customer’s request. |
Welding Collar Flange Dimension Standards
| Nominal Diameter MM | Nominal Diameter Inch | # of Layers Wetted with ChemBond Resin | |||
|---|---|---|---|---|---|
| Outside Glass Layups Width Mesh (Boat) Cloth | |||||
| 100 (4″) | 150 (6″) | 200 (8″) | 300 (12″) | ||
| 50–200 | 2”–8” | 1 | |||
| 250–600 | 10”–24” | 1 | 1 | ||
| 1050–1550 | 42”–62” | 1 | 1 | 1 | |
| > 1550 | > 62” | 1 | 1 | 1 | 2 |
| 650–1000 | 26”–40” | 1 | 1 | 1 | |
Pressed Collar Flange Dimension Table
Tolerance of Welding Collar Flange
| For flanges ANSI 150 LBS | |
|---|---|
| Ø Nominal pipe size | Ø DN |
| 22 | 550 |
| 1/2 | 15 |
| 3/4 | 20 |
| 1 | 25 |
| 1 1/4 | 32 |
| 2 | 50 |
| 2 1/2 | 65 |
| 3 | 80 |
| 3 1/2 | 90 |
| 4 | 100 |
| 5 | 125 |
| 6 | 150 |
| 8 | 200 |
| 1 1/2 | 40 |
| 10 | 250 |
| 12 | 300 |
| 20 | 500 |
| 14 | 350 |
| 16 | 400 |
| 18 | 450 |
| 24 | 600 |