Slip On Flanges (SORF)
Slip On Flanges (SORF)
ASME B16.5 | SORF | RF / FF / RTJ | Class 150–2500
Elite Slip-On Flanges are designed to fit over the outside diameter of pipe and are typically welded internally and externally. They provide simple installation, reliable alignment, and a cost-effective flange connection for a wide range of process, industrial, utility, and pipeline applications.
Elite supplies Slip-On Flanges in carbon steel, stainless steel, duplex and super duplex stainless steel, alloy steel, low-temperature carbon steel, nickel alloys, and copper-nickel alloys. Flanges can be supplied to applicable ASME, ASTM, API, MSS, EN, DIN, BS, and customer project specifications.
Technical Specifications
| Category | Specification |
|---|---|
| Flange Type | Slip-On (SO / SORF) |
| Nominal Size | NPS 1/2–24; larger sizes available to applicable standards |
| Pressure Classes | ASME Class 150, 300, 400, 600, 900, 1500, 2500 |
| Facing | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), as applicable |
| Primary Dimensional Standard | ASME B16.5 |
| Large-Diameter Flanges | ASME B16.47 |
| Pipeline Flanges | MSS SP-44, where applicable |
| Large-Diameter Pipeline Flanges | API 605, where specified |
| Manufacturing | Forged or fabricated, as permitted by the applicable specification |
| Bore | Standard bore, special bore, or customer-specified bore |
| Surface Finish | Standard or customer-specified |
| Heat Treatment | In accordance with applicable material specification |
| Inspection | Dimensional, visual, chemical, mechanical, and other testing as specified |
| NDE | PMI, UT, MT, PT and other NDE methods as specified |
| Documentation | MTC, EN 10204 3.1/3.2, COC, inspection and test reports |
| Special Requirements | ITP, third-party inspection, NACE, sour-service requirements, customer specifications and drawings |
Applicable Standards
For U.S. applications, Elite Slip-On Flanges are primarily supplied in accordance with ASME B16.5 for NPS 1/2 through NPS 24 and ASME B16.47 for applicable large-diameter flanges.
Additional standards may include:
- ASME B16.5 — Pipe Flanges and Flanged Fittings
- ASME B16.47 — Large Diameter Steel Flanges
- MSS SP-44 — Steel Pipeline Flanges
- API 605 — Large-Diameter Carbon Steel Flanges
- ASTM material specifications
- ASME Section II material requirements, where specified
- NACE MR0175 / ISO 15156 — Sour-service applications, where applicable
- EN 1092-1 — European flange systems
- DIN standards, where specified
- BS standards, where specified
- Customer specifications, drawings and project standards
Materials
Carbon Steel
ASTM A105/A105N, ASTM A181, ASTM A350 LF2/LF3 and ASTM A694 F42, F46, F52, F60 and F65.
Stainless Steel
ASTM A182 F304/F304L, F316/F316L, F321/F321H, F347/F347H, F310/F310S, F317 and F904L.
Duplex & Super Duplex
ASTM A182 F51, F53 and F55.
Alloy Steel
ASTM A182 F1, F5, F9, F11, F12, F22, F91 and F92.
Nickel Alloys
Nickel 200/201, Monel 400/K500, Inconel 600/601/625/800/825, Hastelloy C276 and Alloy 20.
Copper-Nickel
UNS C70600 and C71500, including 90/10 and 70/30 Cu-Ni alloys.
Material selection is based on pressure, temperature, process fluid, corrosion conditions, mechanical requirements and applicable project specifications.
Flange Facing Options
Raised Face — RF
The most widely used facing for process, industrial and general piping applications.
Flat Face — FF
Used where a full-face mating surface is required, including selected piping and equipment connections.
Ring Type Joint — RTJ
Used for demanding high-pressure and high-temperature applications requiring a metallic ring-gasket sealing system.
Quality & Inspection
Elite can provide inspection and quality documentation according to project requirements, including:
- Material Test Certificates (MTC)
- EN 10204 3.1 / 3.2 certification
- Dimensional inspection reports
- Chemical analysis
- Mechanical test results
- Heat-treatment records
- Positive Material Identification (PMI)
- Ultrasonic Testing (UT)
- Magnetic Particle Testing (MT)
- Liquid Penetrant Testing (PT)
- Visual inspection reports
- Certificate of Conformance (COC)
- Third-party inspection reports
- ITP and quality documentation
- Packing and marking records
Applications
Slip-On Flanges are commonly supplied for:
- Oil & Gas
- Refining
- Petrochemical
- Chemical Processing
- Power Generation
- LNG & Natural Gas
- Offshore & Marine
- Water & Wastewater
- Mining & Minerals
- Fertilizer
- Pulp & Paper
- Industrial Processing
- Skid & Package Systems
- General Process Piping
Ordering Information
For quotation, please provide:
NPS + Class + Facing + Material + Standard + Bore + Quantity + Inspection Requirements
Example:
6″ Class 150 Slip-On Flange, RF, ASME B16.5, ASTM A105N, Standard Bore, MTC EN 10204 3.1.
