This standard outlines the detailed manufacturing criteria, dimensions, tolerances, and identification markings for injection moulded PVC socket tee fittings with solvent cement joints at a 90-degree angle, specifically for water supply applications. It covers sizes ranging from 16 mm to 315 mm, ensuring consistent quality and compatibility in plumbing systems. The specification is vital for producers, engineers, and installers working with potable water piping networks.
Overview
This standard outlines the detailed manufacturing criteria, dimensions, tolerances, and identification markings for injection moulded PVC socket tee fittings with solvent cement joints at a 90-degree angle, specifically for water supply applications. It covers sizes ranging from 16 mm to 315 mm, ensuring consistent quality and compatibility in plumbing systems. The specification is vital for producers, engineers, and installers working with potable water piping networks.
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Frequently Asked
The primary dimensional control parameter is the laying length (Z) of the 90-degree tee, which varies depending on the nominal pipe size from 16 mm up to 315 mm. Tolerances are asymmetric, allowing a slightly greater positive deviation than negative, to guarantee proper joint assembly. For example, a 16 mm tee has a laying length of 9 mm ±1 mm, while a 315 mm tee has a laying length of 158.5 mm with a +13/-1 mm tolerance. Socket internal diameter and length must align with IS 7834 Part 1 requirements. These measures ensure uniformity and interchangeability of fittings in water supply pipelines.
This specification covers 90-degree injection moulded PVC socket tee fittings with solvent cement joints ranging from 16 mm to 315 mm in nominal diameter. The laying length (Z) for these sizes is defined with specific tolerances to maintain dimensional consistency. Socket dimensions conform to IS 7834 Part 1. Markings include manufacturer identification, fitting size, and pressure classification to ensure proper identification and usability within the specified range.
Marking on 90-degree PVC tees must include the manufacturer's name or identification mark, the nominal size of the fitting, and the pressure class indicating the working pressure rating. This marking protocol is essential for traceability, quality assurance, and confirming that the fitting meets the appropriate pressure specifications. Additionally, laying length dimensions conform to the standard's table, ensuring fitment accuracy.
Injection moulded PVC 90-degree tees must be produced through injection moulding processes as prescribed in IS 7834 Part 1, which covers material selection, manufacturing methods, testing, and sampling procedures. The PVC compound used should be suitable for potable water fittings. The manufacturing process must ensure adherence to the defined dimensional tolerances, particularly the laying length, and the fittings must undergo marking and sampling in accordance with BIS standards to maintain consistent quality and compatibility.
IS 7834 Part 1 establishes the overarching requirements for injection moulded PVC socket fittings with solvent cement joints, including material specifications, manufacturing processes, testing methods, sampling, and general marking guidelines. Part 4 complements this by focusing specifically on 90-degree tee fittings, detailing precise dimensions, tolerances, and marking instructions unique to these fittings. Compliance with Part 1 is mandatory, with Part 4 providing additional details to ensure uniformity and compatibility within PVC piping systems.
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