Domestic Carbon Steel 300# Slip On Flange
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Slip-On flange for bolted pipe connections. Slip-on flanges are fast to fit and weld — the workhorse of general piping construction. Carbon Steel construction.
- Slip-On flange — 300# rated
- Carbon Steel body for durability and long service life
- Raised face per ASME B16.5 / B16.1 standard
- Mates with standard 300# flanges and flange fittings
✔ Used by contractors and professionals
✔ Designed for reliable jobsite performance
Overview
Domestic Carbon Steel 300# Slip On Flange is a slip-on flange for bolted piping connections on water, steam, and industrial fluid systems. Slip-on flanges slide over the pipe and are fillet-welded front and back — faster to fit up than weld necks and suitable for most general piping applications. Flanges are fabricated to ASME B16.5 (300#) dimensional standards.
Common Uses
- Connecting pumps, valves, and equipment to flanged piping systems
- Water, steam, and industrial process fluid piping
- General commercial and industrial piping construction
- HVAC mechanical piping systems
- Municipal water and wastewater systems
Key Features
- Slip-On design — fast fit-up, suitable for general service
- Carbon Steel construction
- 300# pressure class rating
- Raised face per ASME B16.5 / B16.1
Specifications
| Material | Carbon Steel |
| Type | Slip-On Flange |
| Pressure Class | 300# |
| Face | Raised Face |
| Standard | ASME B16.5 |
Frequently Asked Questions
What is the difference between a 150# and 300# flange?
150# flanges are rated for lower pressures and are the standard for most commercial water and HVAC applications. 300# flanges have thicker walls and are rated for higher pressures and temperatures.
What is the difference between weld neck and slip-on flanges?
Weld neck flanges are welded at the neck and provide superior strength for high-pressure and cyclic service. Slip-on flanges slide over the pipe and are fillet-welded — faster to fit but not as strong as weld neck.
What gasket do I need with a raised face flange?
Raised face flanges typically use a full-face or ring gasket. Spiral wound or ring-type joint gaskets are used on higher-pressure applications.
Are flanges supplied with bolts and gaskets?
Flanges are typically supplied individually — bolts, nuts, and gaskets are ordered separately based on service requirements.
Why Contractors Choose This Product
- Slip-on flanges fit up fast — preferred for production piping where speed matters
- 300# rating covers the pressure range for most commercial and industrial water and steam applications
- Carbon Steel construction for reliable long-term service
- PVFPro stocks the full range of flange types, sizes, and pressure classes
Fewer reorders. Lower cost per job. Keeps your crew stocked.
Manufacturer varies based on availability. Contact us before ordering if a specific manufacturer is required.
Related sizes & schedules — same fitting family