ANSI 150# PL
Cost-Effective Solution: Simple structural design and mature manufacturing process reduce production costs, offering excellent value for money compared to welding neck flanges, ideal for large-scale pipeline projects.
Easy & Efficient Installation: The slip-on design allows the flange to slide directly over the pipe end for welding, simplifying alignment and assembly. Reduces welding difficulty and construction time, lowering labor costs.
Wide Pressure & Size Adaptability: Suitable for low to medium pressure applications (PN2.5-PN40/Class150-Class300) with size ranges from 1/2" (DN15) to 60" (DN1500). Custom large-diameter models are available for special pipeline needs.
Reliable Sealing Performance: Precision-machined sealing surfaces (RF, FF, etc.) paired with gaskets ensure tight connection, effectively preventing leakage of non-corrosive or moderately corrosive media.
1. Overview
The Slip On Flange (abbreviated as PL Flange) is a widely used piping connection component characterized by its simple structure, cost-effectiveness, and easy installation. Designed to slide over the pipe end and secure via fillet welding, it is ideal for low to medium-pressure industrial pipeline systems. Compliant with global standards, it is extensively applied in water supply, heating, chemical, oil & gas, marine, and general industrial sectors.
2. Core Structure
Flange Disc: A circular plate with evenly distributed bolt holes for fastening to matching flanges. The disc features a precision-machined sealing surface (commonly RF, FF) to ensure leak-proof performance when paired with gaskets.
Short Cylindrical Neck: A shallow, integrated neck at the inner edge of the disc, facilitating sliding over the pipe end and providing a stable welding base. The neck length is optimized for easy fillet welding without compromising structural stability.
Welding Groove: Pre-designed grooves on the inner and outer sides of the neck enable secure fillet welding with the pipe, ensuring strong connection and preventing medium leakage.
3. Key Specifications
4. Product Advantages
Cost-Effective: Simple structure and mature manufacturing process reduce production costs, making it an economical choice for large-scale projects compared to welding neck flanges.
Easy Installation: Slips directly over the pipe end, simplifying alignment and welding. Requires only fillet welding (no butt welding) to reduce construction difficulty and labor time.
Wide Application Range: Suitable for low to medium pressure (up to PN40/Class600) and temperatures (-20℃ to 450℃), adapting to various media such as water, oil, gas, and moderately corrosive fluids.
Reliable Sealing: Precision-machined sealing surfaces (Ra≤6.3μm) paired with compatible gaskets ensure tight connection, minimizing leakage risks in general industrial environments.
Lightweight & Space-Saving: Compact design and lighter weight than welding neck flanges save installation space and reduce transportation costs, ideal for limited-space layouts.
Global Compatibility: Complies with international standards, ensuring interchangeability with global piping components, facilitating cross-border trade and project collaboration.
Low Maintenance: Durable materials and stable structure reduce wear and tear, enabling easy disassembly and replacement when needed, lowering long-term maintenance costs.
