Description
Product Detail
Slip on pipe flange is a popular flange connection used for low to medium pressure piping where easy alignment, economical installation and convenient welding are required. The flange is slipped over the pipe, then welded internally and externally to provide good strength and leakage resistance. It is widely used in process piping, water lines, fire protection, chemical plants, marine systems and utility pipelines.
SASA FLANGE supplies slip-on flanges in forged and plate-cut forms according to ASME B16.5, ASME B16.47, EN 1092-1, DIN, JIS and GB standards. Customized sizes, drilling patterns and facing types are available. Each order can be supplied with chemical analysis, mechanical testing, dimensional inspection, PMI testing, EN 10204 3.1 certificate and full heat number traceability to meet project and export requirements.
- ✓Product Name: Slip On Pipe Flange
- ✓Material Grade: Carbon steel, stainless steel, alloy steel, duplex stainless steel and nickel alloy grades
- ✓Product Type: Slip-On Flange / SO Flange
- ✓Main Feature: Easy pipe alignment, economical installation, dual fillet weld connection and wide standard compatibility
- ✓Applications: Oil and gas, petrochemical, power generation, water treatment, marine, fire protection and general industrial piping
Product Parameters
| Product Name | Slip On Pipe Flange |
| Material Grade | ASTM A105, A350 LF2, A694 F52/F60, A182 F304/L, F316/L, F321, F11, F22, F51, F53 |
| Material Type | Carbon Steel, Stainless Steel, Alloy Steel, Duplex Stainless Steel, Nickel Alloy |
| Product Form | Forged flange, plate flange, machined flange |
| Size Range | DN15 – DN1500 (1/2 inch – 60 inch) |
| Pressure Class | Class 150 – 2500 / PN6 – PN100 / JIS 5K – 40K |
| Sealing Face | RF, FF, RTJ, TG, MFM |
| Surface Treatment | Anti-rust oil, black painting, yellow painting, hot-dip galvanized, pickling, passivation |
| Standard | ASME B16.5, ASME B16.47 Series A/B, EN 1092-1, DIN, JIS B2220, GB/T 9119 or customer specification |
| Inspection | Chemical Analysis, Mechanical Test, PMI Test, Dimensional, Hydrostatic |
| Certificate | EN 10204 3.1 Material Certificate available |
| Processing Service | Cutting, CNC Machining, Custom Drilling, Custom Size Processing |
Chemical Composition
Chemical composition depends on the selected material grade of the slip on pipe flange. The values below are for reference based on a common carbon steel grade. Final chemistry shall comply with the applicable ASTM, EN, DIN, JIS or GB standard and will be confirmed by the mill test certificate and inspection records.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| ASTM A105 Content % | 0.35 max | 0.10 – 0.35 | 0.60 – 1.05 | 0.035 max | 0.040 max | 0.30 max | 0.40 max | 0.12 max | Cu 0.40 max, V 0.08 max |
Mechanical Properties
Mechanical properties of slip on pipe flanges vary according to material grade, heat treatment condition, flange size and manufacturing route. The values below show typical minimum requirements for common grades used in industrial piping. Final test results are subject to the applicable product standard, approved material specification and certified inspection documents.
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| ASTM A105 | 485 MPa min | 250 MPa min | 22% min | 187 HB max | 7.85 g/cm3 |
| ASTM A182 F316/F316L | 515 MPa min | 205 MPa min | 30% min | 217 HB max | 7.98 g/cm3 |
Common Size Table
| Size Range | Pressure Class | Sealing Face | Material | Availability |
|---|---|---|---|---|
| DN15 – DN50 | Class 150 – 600 | RF / FF | A105, F304/L, F316/L | Stock / Production |
| DN65 – DN300 | Class 150 – 1500 | RF / RTJ | A105, LF2, F304/L, F316/L, F11, F22 | Stock / Production |
| DN350 – DN600 | Class 150 – 2500 | RF / RTJ | A105, LF2, F11, F22, F51 | Production |
| DN700 – DN1500 | Class 150 – 900 | RF / FF | A105, LF2, F304/L, F316/L | Made to Order |
Different Specifications Comparison
| Type | Description | Typical Use |
|---|---|---|
| ASME Slip-On RF | Raised face slip-on flange for standard gasket seating and general service piping | Oil and gas, chemical plants, utilities |
| ASME Slip-On FF | Flat face slip-on flange for mating with flat face valves, pumps or cast iron equipment | Water treatment, low pressure services |
| EN 1092-1 Type 12 | European slip-on plate or hubbed flange design with PN pressure ratings | Process piping and industrial plants in Europe and export projects |
| JIS Slip-On Flange | Slip-on flange manufactured to JIS bolt pattern and K pressure designation | Marine, shipbuilding and Asian industrial systems |
Equivalent Standards and International Names
Slip on pipe flanges are produced to several international standards with different pressure ratings, dimensions and material naming systems. Equivalent grade selection should consider design code, service medium, pressure-temperature rating and project specification. SASA FLANGE can assist in matching ASTM, EN, DIN, JIS and GB material and dimensional requirements for export projects.
| Standard / Region | Standard Code | Typical Grade / Equivalent |
|---|---|---|
| USA | ASME B16.5 | ASTM A105, A182 F304/F316, A350 LF2 |
| Europe | EN 1092-1 | P245GH, S235JR, 1.4301, 1.4404 |
| Germany | DIN 2527 / 2566 | C22.8, RSt37-2, 1.4301, 1.4571 |
| Japan | JIS B2220 | SS400, SFVC2A, SUS304, SUS316 |
| China | GB/T 9119 | 20#, 16Mn, 304, 316L |
Production Process Flow
Slip on pipe flange quality depends on strict control of raw material, machining accuracy, facing finish and final inspection. SASA FLANGE follows documented production procedures to ensure dimensional consistency, material conformity and reliable performance in industrial piping service.
- 1. Raw Material Selection
- 2. Forging / Cutting
- 3. Heat Treatment
- 4. Rough Machining
- 5. Finish Machining
- 6. Drilling
- 7. Surface Treatment
- 8. Inspection
- 9. Marking
- 10. Packing
- 11. Delivery
| Process Step | Description | Quality Control Point |
|---|---|---|
| Raw Material | Select certified forging billets or plates | Material certificate and traceability |
| Forging | Hot forging to achieve required shape | Forging temperature and reduction ratio |
| Heat Treatment | Normalizing, tempering or annealing | Temperature and holding time control |
| Machining | Sealing face, bolt holes, dimensions | Dimensional accuracy and surface finish |
| Inspection | Final inspection before shipment | Dimension, surface, PMI, hydrostatic |
Product Inspection
1. Chemical Composition Inspection
Chemical analysis is performed to verify that the flange material meets the required grade specification such as ASTM A105 or A182 F316. Test results for carbon, manganese, chromium, nickel and other key elements are checked against standard limits. This ensures the selected slip on pipe flange has the correct metallurgical composition before release for machining or shipment.
2. Mechanical Properties Testing
Mechanical testing confirms that the flange material satisfies specified tensile strength, yield strength, elongation and hardness requirements. Depending on grade and project requirements, tests are carried out on representative samples after heat treatment. This helps ensure the slip-on flange can withstand service loads, assembly stress and operating conditions in demanding industrial piping systems.
3. Dimensional Inspection
Dimensional inspection checks outside diameter, bore size, thickness, bolt circle, bolt hole diameter, number of holes and hub or face profile according to the applicable standard. Special attention is given to raised face finish and concentricity for proper gasket sealing. Accurate dimensions are essential to ensure interchangeability, smooth installation and correct fit-up with mating flanges and pipe.
4. PMI Testing and Hydrostatic Testing
Positive material identification is available to confirm alloy chemistry for stainless, alloy steel and duplex slip on flanges, reducing the risk of grade mix-up. Hydrostatic or assembly pressure verification can be arranged when required by project specification. SASA FLANGE also provides EN 10204 3.1 certificate, inspection reports and full traceability records for each supplied batch.
Product Packaging
- ✓Wooden Case Packaging: Suitable for high-pressure and large-diameter products
- ✓Pallet Packing with Shrink Wrap: Suitable for batch shipments and standard sizes
- ✓Anti-rust Oil Coating + Waterproof Paper: Used for ocean freight protection
- ✓Individual Plastic Bag + Carton: Used for small fittings and threaded products
- ✓Clear Marking: Grade, size, pressure class, heat number and PO number
Applications
Slip on pipe flanges are widely used in industrial piping because they are easy to align during installation and offer economical fabrication for many pressure classes. They are especially suitable for low to medium pressure service, utility systems and process lines where reliable flange connection, straightforward welding and maintenance convenience are important.
| Industry | Typical Applications | Why This Product Is Used |
|---|---|---|
| Oil and Gas | Tank farms, utility piping, low to medium pressure process lines, firewater systems | Economical flange solution with easy installation and reliable welded connection |
| Chemical Processing | Acid and solvent transfer lines, cooling water systems, general process piping | Available in stainless and alloy grades for corrosion resistance and standard compatibility |
| Power Generation | Boiler auxiliary lines, service water, compressed air and condensate systems | Provides practical assembly, maintenance convenience and broad pressure class options |
| Water Treatment | Raw water, filtered water, dosing lines, pump and valve connections | Flat face or raised face options suit water service and frequent equipment connections |
| Marine and Offshore | Ballast systems, seawater lines, utility piping and deck service lines | JIS, DIN and ASME standard availability with galvanized or stainless material options |
Why Choose SASA FLANGE?
- ✓Professional manufacturer of Slip-On Flanges for global industrial projects
- ✓Customized size, pressure class and material grade according to drawings
- ✓Full standard support: ASME, EN, DIN, JIS, GB, GOST and customer specifications
- ✓Material traceability with heat number control and EN 10204 3.1 material certificate
- ✓Chemical analysis, mechanical testing, PMI testing, hydrostatic and dimensional inspection
- ✓Stock availability for standard items, lead time 3-7 days; custom production 15-30 days
- ✓Export-grade packaging for sea, air and land transportation
- ✓15+ years experience supplying 50+ countries worldwide
FAQ
Q: What is a slip on pipe flange?
A: A slip on pipe flange is a flange that slides over the outside diameter of the pipe before welding. It is normally welded with fillet welds on both the inside and outside, giving good strength and sealing performance. This flange type is widely used because it is economical, easy to align during installation and suitable for many general industrial piping services.
Q: What materials are available for slip on pipe flanges?
A: SASA FLANGE supplies slip on pipe flanges in carbon steel, low temperature carbon steel, stainless steel, alloy steel, duplex stainless steel and selected nickel alloy materials. Common grades include ASTM A105, A350 LF2, A182 F304/L, F316/L, F11, F22, F51 and F53. Other grades can be produced according to project specifications and international standards.
Q: What pressure class is supported?
A: Slip on pipe flanges are available in a wide pressure range depending on size, standard and material. We commonly supply ASME Class 150, 300, 600, 900, 1500 and 2500, as well as EN PN6 to PN100 and JIS 5K to 40K. Selection should match the design pressure, temperature and piping code requirements of the application.
Q: Can SASA FLANGE supply custom sizes?
A: Yes. SASA FLANGE can manufacture custom slip on pipe flanges according to drawings, project standards or special dimensional requirements. We can provide custom drilling, non-standard bolt hole patterns, special bore sizes, different sealing faces such as RF or FF, and a wide choice of material grades for matching existing piping systems or engineering specifications.
Q: What certificate is provided?
A: We can provide EN 10204 3.1 material certificate together with mill test reports, dimensional inspection reports and, where required, PMI records. Mechanical test results, chemical analysis and hydrostatic or pressure verification documents can also be arranged according to order requirements. Full heat number traceability is maintained from raw material to finished flange for project and export documentation.
Contact Us
If you are looking for slip on pipe flange or related custom flange products, please contact SASA FLANGE with your required size, pressure class, material grade, standard, surface treatment, quantity and inspection requirements. Our team will provide professional technical solutions and competitive quotation within 24 hours.
- 📧 Email: sales@sasaflange.com
- 📱 WhatsApp: +86 13764965049
- ☎️ Tel: +86 21 52236361
- 🌐 Website: www.sasaflange.com
