FL1RSO4X150 – Slip-On Flange, Carbon Steel, 4 in Nominal, 150 lb, Raised Face
FL1RSO4X150 – Slip-On Flange, Carbon Steel, 4 in Nominal, 150 lb, Raised Face
Call 850-565-3492 for live factory inventory, lead times & emergency freight options.
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Ships factory-new in original packaging.
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Commercial Ordering FAQ
How do I verify that FL1RSO4X150 – Slip-On Flange, Carbon Steel, 4 in Nominal, 150 lb, Raised Face is the correct replacement part for my equipment?
Check the OEM part number (FL1RSO4X150) against your equipment nameplate or the manufacturer's repair parts list before ordering. If you are not sure, call the National Boiler Supply order desk at 850-565-3492 and we can cross-reference your equipment model and serial numbers before the order ships.
What are the shipping and freight options for Generic orders?
Standard parcel orders ship quickly from commercial distribution centers. Shipping is a $35 flat rate on orders under $999, and qualifying orders of $999 or more ship free by ground. Heavy equipment that has to move by LTL freight is quoted after the order is placed and confirmed with you before dispatch.
Can contractors or facility managers request a formal quote or use a Purchase Order (PO)?
Yes. National Boiler Supply works with commercial contractors, mechanical engineers, municipalities, and facility teams. Call 850-565-3492 for a formal quote, bulk pricing, or PO and tax-exempt order processing.
What if this Generic part is marked Call to Order or needed for an emergency repair?
Call our order desk at 850-565-3492. We can confirm factory lead times right away and arrange expedited air or hot-shot delivery when a repair cannot wait.
National Boiler Supply supplies the FL1RSO4X150 Slip-On Flange to contractors, facility teams, and purchasing departments. Get fast dispatch, contractor-ready quotes, and order desk support at 850-565-3492.
Product Overview
It features a ring-shaped construction with a bore slightly larger than the pipe outside diameter, allowing it to slip over the pipe for easier alignment and connection. The flange is typically tack-welded and fillet-welded on both the inside and outside to secure the joint. The flange is intended for use in applications within specified pressure ranges according to industry standards and provides corrosion resistance through its stainless steel material.
Features
- Connection Surface: Raised Face for sealing contact with mating surfaces.
- Class: 150, indicating the pressure rating.
- Flange Outside Diameter: 9 inches.
- Maximum Operating Pressure: Rated for operation at up to 150 psi within specified standards.
- Nominal Pipe Size: 4 inches.
- Number of Bolt Holes: 8.
- Pipe Fitting Material: Stainless Steel.
- Standards: ASME B16.5, ASTM A/SA-105.
Technical Specifications
| Manufacturer Part Number | FL1RSO4X150 |
|---|
OEM Part Verification: Confirm part number FL1RSO4X150 against your equipment nameplate or parts list before ordering. Our order desk can cross-check it for you.
Order Desk Support: Call 850-565-3492 for formal quotes, lead times, and volume pricing.
Related Components & Replacement Parts
- FL1RSO4X250 – Flange, Carbon Steel, Slip-On, 9 in – OEM Part # FL1RSO4X250
- FL1RSO4X3 – Flange, Carbon Steel, Slip-On, 9 in – OEM Part # FL1RSO4X3
- FL1RSO5X2 – Flange, Carbon Steel, Slip-On, 10 in – OEM Part # FL1RSO5X2
- FL1RSO4X2 – Flange, Carbon Steel, Slip-On, 9 in – OEM Part # FL1RSO4X2
- FL1RSO5X3 – Flange, Carbon Steel, Slip-On, 10 in – OEM Part # FL1RSO5X3
Need help confirming a part number or cross-reference? Call our order desk at 850-565-3492.
Corporate Procurement & PO Processing
Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
Apply for Trade Account & Terms →📋 Procurement & Shipping Notice
- LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
- Project Timelines & Submittals: Need guaranteed delivery dates, formal submittals, or tax-exempt processing?
👉 Request a Commercial Quote or contact our procurement team for direct freight scheduling.