Product Overview
Precision-forged female (internal) threaded raised-face (RF) flange made from stainless steel grades 304, 316 and 316L. Designed to ASME/ANSI dimensions with Class 150 pressure rating and available with BSP (ISO 228) or NPT (ANSI B1.20.1) internal threads, this flange provides a compact, corrosion-resistant, easy-to-install connection for piping systems where welding is not desirable. Ideal for chemical, marine, water and sanitary applications that require reliable sealing and quick assembly/disassembly.
Product Specifications
| Item | Specification |
|---|---|
| Product Name | Female Threaded Raised Face Flange (RF) — Class 150 |
| Materials | Stainless Steel 304 / 316 / 316L (AISI) |
| Standards / Codes | ASME/ANSI B16.5 (dimensions & pressure class); thread standards: BSP (ISO 228), NPT (ANSI B1.20.1) |
| Connection Type | Internal (female) thread — BSP or NPT; Raised Face sealing surface |
| Size Range | DN15 – DN200 (½″ – 8″) — other sizes on request |
| Pressure Rating | Class 150 (150#) |
| Manufacturing | Forged / CNC machined / finish & passivation |
| Surface Finish | Smooth machined RF; options: polished, passivated, electropolished |
| Typical Coatings | Passivation, light polishing; PTFE / gasket recommendations for sealing |
| Inspection & Tests | Dimensional inspection, visual, material test certificate (MTC), pressure/leak test on request |
Thread & Sealing Details
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BSP option: conforms to ISO 228 (parallel threads) — sealing achieved with gasket/washer or tapered seal depending on mating part.
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NPT option: ANSI B1.20.1 (tapered thread) — often requires thread sealant or tape for leak-tight joint.
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Raised Face (RF): standard RF face for use with standard gaskets (spiral wound, PTFE, compressed non-asbestos) to ensure reliable sealing at Class 150 pressures.
Key Features
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Corrosion-resistant stainless steel construction (304/316/316L) for long service life.
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Female (internal) threaded design — ideal where welding is impractical or prohibited.
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Raised Face (RF) for improved gasket seating and leak-tight performance.
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BSP and NPT thread options for international compatibility.
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Forged and CNC machined for dimensional accuracy and interchangeability.
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Surface treatments available (passivation, electropolish) for sanitary or marine environments.
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Supplied with material certificates and inspection reports upon request.
Typical Applications
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Chemical processing and corrosive fluid systems
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Water treatment and distribution networks
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Marine piping and offshore installations (with correct material selection)
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HVAC systems and chilled water lines
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Food, beverage and pharmaceutical piping (electropolished / 316L preferred)
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Temporary connections, maintenance ports and instrumentation lines
Ordering Options & Customization
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Choice of stainless grade: 304 / 316 / 316L
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Thread type: BSP (ISO 228) or NPT (ANSI B1.20.1)
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Size and pressure class per customer specification (other classes available on request)
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Surface finish: passivated, polished, electropolished
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Custom marking, private labeling and OEM/ODM packaging available
Company Brief — Hebei Cangtie Industrial Co., Ltd
We are a factory-based manufacturer specializing in flanges and pipe fittings, offering forged stainless-steel products with full quality control and export experience. Located in Yanshan Economic Development Zone, Cangzhou, Hebei Province, we supply global customers with MTC, inspection reports and OEM/ODM services.
Contact
Contact Person: Hudson Liu
WhatsApp / Mobile: +86 157 3370 8805
Email: hudson@cangtiepipe.com
Website: https://ctflange.com/
Short FAQ
Q: Do you supply 316L for food/pharma applications?
A: Yes — 316L and electropolishing/options for sanitary requirements are available.
Q: What thread standard should I choose, BSP or NPT?
A: Choose BSP for European / ISO-based systems (parallel threads), NPT for North American tapered thread systems. We can manufacture either.
Q: What gasket type is recommended for RF Class 150?
A: Commonly used: spiral-wound, compressed non-asbestos, or PTFE gaskets depending on media and temperature.
