Stainless Steel Flange DN15 to DN1200
A stainless steel flange is the disc shaped part that joins two lengths of pipe, with a gasket between the faces and bolts pulling them together. This programme covers DN15 through DN1200 in Class 150, 300, 600, 900 and…
What This Product Is For
A stainless steel flange is the disc shaped part that joins two lengths of pipe, with a gasket between the faces and bolts pulling them together. This programme covers DN15 through DN1200 in Class 150, 300, 600, 900 and 1500, in the plate, slip on, weld neck, blind and threaded types. Material runs from ASTM A182 F304 and F316 through to 904L, 2205, 2507 and 321, so the flange can be matched to the line it serves.
Key Benefits
- One size table from DN15 to DN1200 covers instrument tappings through to large header connections
- Five pressure classes so the flange rating matches the line rather than being over specified
- Five face and body types including weld neck for high pressure and blind for future tie ins
- Duplex and super austenitic grades available for chloride and acid service
- Bolt circle, hole count and thread published from DN15 up, which removes guesswork at detail design
Who It Is For
- Piping designers detailing flanged joints to GB, ASTM, JIS, EN or DIN
- Pipe spool fabricators buying flanges by the set
- Plant maintenance teams replacing corroded joints
- Distributors stocking stainless flanges across pressure classes
Problems It Solves
- Mismatched bolt circles when flanges come from two different standards
- Leaking joints where the class was under specified for the line pressure
- Threaded flanges used above their practical pressure limit
- Long waits for duplex and super austenitic flanges in large diameters
Application Scenarios
- Process pipeline connections that need to be broken for maintenance
- Large diameter header and manifold tie ins
- High pressure lines above 4 kg where a welded flange is required rather than a threaded one
- Chloride bearing service where 904L, 2205 or 2507 is specified
Specifications
Every value below is taken from the published product data. Where a figure is not published it is left out rather than estimated.
| Size | DN15 to DN1200 |
|---|---|
| Standard | GB, ASTM, JIS, EN, DIN |
| Pressure Class | 150, 300, 600, 900, 1500 |
| Flange Types | PL, SO, WN, BL, TH |
| Materials | ASTM A182 F304, 304L, F316, 316L, 904L, 2205, 2507, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8 |
| Bolt Hole Centre Circle Diameter | 50 mm to 2130 mm |
| Bolt Hole Diameter | 11 mm to 30 mm |
| Number of Bolt Holes | 4 to 48 |
| Thread | M10 to M27 |
| Flange Thickness | 12 mm to 58 mm |
| Unit Weight Range | 0.36 kg to 234.6 kg |
Technical Features
- Size DN15 to DN1200
- Pressure Class 150, 300, 600, 900 and 1500
- Types PL, SO, WN, BL and TH
- Bolt hole centre circle diameter 50 mm to 2130 mm
- Flange thickness 12 mm to 58 mm and bolt hole diameter 11 mm to 30 mm
Materials
- ASTM A182 F304 and F304L
- F316 and 316L
- 904L
- Duplex 2205 and super duplex 2507
- 321, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 18-8
Manufacturing Process
- Forging
- Machining
- Drilling
- Facing
Quality Control
- Bolt circle diameter, hole count and hole diameter checked against the ordered standard and class
- Flange thickness verified within the 12 mm to 58 mm range for the size
- Material grade confirmed against the ASTM A182 designation on the order
- Face finish inspected before packing
Customisation Options
- Flange type selected from PL, SO, WN, BL or TH
- Standard selected from GB, ASTM, JIS, EN or DIN
- Material upgraded to 904L, 2205 or 2507 for chloride or acid service
Use Guide
- Fix the standard first, because GB, ASTM, JIS, EN and DIN do not share the same bolt circles
- Match flange class to the design pressure, not to the pipe schedule alone
- Fit a gasket between the two faces and tighten the bolts in a crossing pattern
- Use the published thickness and bolt hole table to check clearance before detailing the spool
How It Compares With the Alternatives
| Threaded flange | Low pressure lines can use a threaded flange, but above about 4 kg of pressure a welded flange is used instead |
|---|---|
| Slip on flange | A weld neck flange transfers stress into the pipe wall and is preferred at Class 600 and above, while a slip on is quicker to fit at low pressure |
| Carbon steel flange | Stainless holds up in wet and chloride service where a coated carbon flange corrodes at the gasket face first |
Related Products
Nickel 200 Seamless Pipe
Nickel 200 seamless pipe is commercially pure wrought nickel supplied to ASTM B161 under UNS N02200. It is the standard choice for…
View specifications →
Nickel Alloy 625 Exhaust Tubing
Nickel alloy 625 exhaust tubing is cold worked seamless tube covered by ASTM B444 under UNS N06625, also carried as BS 3074 NA21…
View specifications →
SS316 Equal Angle Bar 75 x 75 x 6 mm x 6 m
This is a 316 stainless equal angle bar in 75 x 75 x 6 mm section at 6 m length, produced to JIS, AISI and ASTM chemical…
View specifications →
Monel Alloy K500
Monel Alloy K500 is a nickel copper superalloy with high strength and strong corrosion resistance in marine environments. It is…
View specifications →Stainless Steel Flange DN15 to DN1200 Questions
What sizes do you make
Which pressure classes are available
Which flange types can you supply
Which materials can the flange be made from
When should I use a welded flange instead of a threaded one
How heavy is one flange
Quote Stainless Steel Flange DN15 to DN1200
Send the size, wall or thickness, quantity and destination port. Certificates, packing and lead time are confirmed on the quotation.