Xieyu S.H Premium PPH Socket Fusion One-Piece Flanges with Gasket (S5 / 1.25MPa)

Connect your chemical, industrial, and fluid-treatment pipeline systems securely to metal pumps, valves, and vessels with our premium Xieyu S.H PPH socket fusion one-piece flanges, available at Atradesen.com. Manufactured by Xieyu (S.H / HIEH), a premier global leader in high-performance thermoplastic flow control, these heavy-duty PPH (Polypropylene Homopolymer) flanges are engineered to withstand continuous operating pressures up to 1.25 MPa (181 PSI) and temperatures from -20°C to 100°C.

Featuring standard parallel socket depths and pre-drilled bolt circles, this professional flanged joint series simplifies your transitions from rigid plastic pipelines to metallic industrial machinery.

Heavy-Duty Gusseted Reinforcement & Seamless Welding

To deliver maximum structural reliability under high bolt tension, this flange adapter features integrated triangular gusseted reinforcement ribs surrounding the socket hub. This advanced design prevents flange face warping, bending, or stress fractures when tightening standard connecting bolts. The smooth central socket is engineered for standard hot-melt socket fusion welding, melting the outer pipe wall and the inner socket together to establish a completely seamless, leak-proof molecular system.

Complete Package with Premium Sealing Gasket Included

Every flange package comes pre-packed with a matching high-density rubber sealing gasket. This gasket compresses uniformly between the two flange faces during bolt-tightening, filling micro-gaps to secure a perfect, watertight seal. PPH Homopolymer offers superior chemical resistance to highly corrosive media, pickling acids, waste acids, alkaline wash solutions, and industrial wastewater, making it an excellent choice for environmental protection ventilation, electroplating lines, and food processing lines.

⚠️ Sizing & Socket Fusion Guidelines

Nominal pipe dimensions are based on standard outer diameters. Please measure your pipe outer diameter (OD) before placing your order:

• Flange Socket Inner Diameter (ID): The designated nominal size corresponds directly to the outer diameter (OD) of your pipe: 20mm (DN15), 25mm (DN20), 32mm (DN25), 40mm (DN32), 50mm (DN40), 63mm (DN50), 75mm (DN65), 90mm (DN80), and 110mm (DN100).
• Connection Methods: Requires standard hot-melt socket fusion welding using professional heating equipment to melt the joints together, securing a completely seamless, leak-proof molecular system. Alternatively, they can be welded using PPH plastic welding rods.
• Note: Standard flanged wafer-type or bolt-face installation. Connection bolts must be prepared separately.

Technical Specifications

Frequently Asked Questions (FAQ)

Q: Why do these PPH flanges feature triangular gusseted ribs?

A: When tightening the connecting bolts on a standard plastic flange, the pulling force concentrates around the bolt holes, which can cause the outer flange face to warp or bend. This deformation leads to uneven gasket compression and leakage. Symmetrical triangular gussets distribute this pulling stress from the flange plate directly into the thick central pipe socket, keeping the flange face perfectly flat and secure.

Q: What is the best way to secure a leak-free seal using these flanged fittings?

A: First, ensure both flange faces are clean and dry. Place the included flat rubber gasket concentrically between the flange faces. Insert the bolts and tighten the nuts hand-tight. Then, use a wrench to tighten the nuts in a "cross" or star pattern (alternating opposite sides) in incremental stages. This ensures the gasket compresses evenly, preventing uneven gaps and securing a leak-free, high-pressure seal.