Fabricated UPVC Fittings
Fabricated UPVC fittings are custom-made, non-standard pipe connection components, often larger than 12 inches in diameter, constructed by joining sections of pipe or other components rather than being made from an injection mold. They retain the benefits of standard UPVC, including high strength, corrosion resistance, ease of installation, low maintenance, and suitability for transporting water. Specifications for fabricated fittings would depend on the specific application and pressure requirements, adhering to standards like those set by ASTM or BIS for the UPVC material used.
Description of Fabricated UPVC Fittings
Method of Construction:
Instead of a single molded piece, fabricated fittings are assembled from multiple pieces of UPVC pipe or other components.
Size:
This construction method is typically used for fittings larger than 12 inches in diameter, which are often too large for traditional injection molding.
Purpose:
Like all fittings, they connect sections of pipe, adapt to different sizes or shapes, and serve various functions within a piping system.
Key Features of UPVC (as applicable to fabricated fittings)
Corrosion and Chemical Resistance:
They do not corrode and are resistant to a wide range of chemicals, which is crucial for long-term durability.
High Mechanical Strength:
Despite being lightweight, they possess excellent tensile and impact strength.
Durability and Long Life:
UPVC's non-reactive nature and resistance to scaling ensure a long service life and reduce the need for frequent replacement.
Lightweight and Easy Installation:
Their low weight makes them easier to handle and install compared to metal pipes, with joints typically welded using solvent cement.
Hygienic Properties:
Being lead-free and antimicrobial, they are safe for use in transporting drinking water.
UV Stabilization:
Many UPVC fittings are UV-stabilized, making them suitable for outdoor applications without degradation.
Fire Resistance:
They are resistant to fire and have flame-retardant properties.
General Specifications to Consider
Pressure Rating:
The specific pressure rating (e.g., in MPa) is a critical specification, indicated by classes like Class 1 (0.25 MPa) or Class 2 (0.4 MPa) with corresponding color markings.
Material Compliance:
The base UPVC material should meet relevant standards, such as ASTM D1785 for pipes.
Hydrostatic Design Basis (HDB):
Fittings must be made from PVC compounds meeting minimum HDB requirements for pressure applications.
Application-Specific Requirements:
For specialized applications, additional specifications related to temperature resistance (e.g., up to 60°C), chemical resistance, and regulatory compliance (e.g., for drinking water) are important.
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