Premium-grade Slip-On Flange with Neck ASME B16.5 DN15-DN2000/½"-80"

 Alloy Steel Slip-On Flanges with Neck: Optimized Strength & Simplified Alignment for ASME B16.5 Systems

Alloy Steel Slip-On Flanges with Neck combine the ease of installation of a standard slip-on flange with the enhanced structural integrity provided by a tapered hub. This design offers a more reliable alternative to plate flanges for services requiring better performance under mechanical stress and thermal cycling. Primarily used in chemical, water, and lower-pressure hydrocarbon services where frequent disassembly is not anticipated, they are a cost-effective choice for robust piping networks.

Product Description:

This flange type features a low-profile neck (or hub) that is welded both at the pipe's outer diameter and internally at the hub's base. It is manufactured from high-performance alloy steels (e.g., ASTM A182 F304, F316, F11) and is designed to slide over the pipe end before welding. The internal weld provides additional strength and improves fatigue resistance compared to plain slip-on designs.

Key Parameters:

Available in pressure classes from ASME B16.5 Class 150 to Class 600. Standard sizes range from 1/2" to 24". Common face types include Raised Face (RF) and Flat Face (FF). Material grades comply with ASTM A182 standards, suitable for operating temperatures from -20°F to 1000°F (-29°C to 538°C) depending on the alloy.

Applications:

Ideal for moderate-pressure process lines in chemical plants, fuel oil and water supply systems, fire protection piping, and power plant auxiliary lines. They are commonly used in applications where the system is not subject to severe bending stresses or significant thermal shock.

Advantages:

Offers easier alignment during assembly than weld neck flanges, reducing installation time and cost. The neck provides improved stress distribution compared to plate flanges. The internal weld offers better resistance to leakage and fatigue under pressure fluctuations. It is more economical in material cost than a weld neck flange for similar size and rating.

Functionality:

Provides a permanent, welded connection that is stronger than a threaded joint and more leak-tight than a plain slip-on flange. The primary function is to create a stable and sealed interface between pipe sections, valves, or equipment nozzles in systems where high integrity is needed but the highest pressure ratings are not required.

.Payment & Invoicing
First-Time Clients: 50% advance payment, 50% balance before shipment.

Strategic Clients: 30% advance, 70% payment against copy of Bill of Lading.

Long-Term Agreements: 60-day credit terms available (subject to credit approval).

Invoicing: 13% VAT Special Invoice provided; FORM A Certificate of Origin for exports.

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