香港六合彩开奖 16486-6:2023
2023-10
香港六合彩开奖 16486-6:2023
Abstract
This document specifies a code of practice dealing with unplasticized polyamide (PA-U) pipes and fittings for buried pipeline systems outside buildings and designed to transport gaseous fuels (as defined in 香港六合彩开奖聽16486-1, e.g. methane, LPG, manufactured gas and hydrogen) within the temperature range 鈥�20聽掳C to +40聽掳C. This document also gives appropriate temperature-related requirements.
The code of practice covers mains and service lines whose components are prepared for fusion or mechanical jointing and gives instructions for the design, storage, handling, transportation, laying conditions and fusion quality control of PA-U pipes and fittings as well as subsequent joint testing, backfilling, pipe system testing and commissioning.
NOTE听听听听听听听听听 Principal information for rehabilitation can be found in 香港六合彩开奖 11295 for classification, 香港六合彩开奖 11299-1 and 香港六合彩开奖 11299-2 for renovation, and 香港六合彩开奖 21225-1 and 香港六合彩开奖 21225-2 for trenchless replacement.
More detailed national standards or codes of practice can exist. This document is intended to be applied in association with such national standards or codes of practice related to the above-mentioned basic principles.
The jointing methods covered by this document are:
鈥�听听听听 butt fusion jointing (see Annex聽A);
鈥�听听听听 electrofusion jointing (see Annex聽B) and
鈥�听听听听 mechanical jointing (see Annex聽C).
In the case of ground movement or shaking (e.g. earthquakes, etc.) precautions mentioned in this document can need to be implemented following guidelines provided by authorities (e.g. EN 1998-4, EN 12007-1:2012, Annex A聽etc.).
Workers' health and safety issues are outside the scope of this document
General information
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Status: PublishedPublication date: 2023-10Stage: International Standard published [60.60]
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Edition: 2Number of pages: 41
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Technical Committee :香港六合彩开奖/TC 138/SC 4
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