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Brass or bronze fittings are common in copper piping and plumbing systems. Fire resistance , earthquake resistance, mechanical ruggedness, theft resistance, and other factors also influence the choice of pipe and fitting materials.
Bismuth bronze or bismuth brass is a copper alloy which typically contains 1-3% bismuth by weight, although some alloys contain over 6% Bi. This bronze alloy is very corrosion -resistant, a property which makes it suitable for use in environments such as the ocean.
Islamic Golden Age brass astrolabe Brass lectern with an eagle. Attributed to Aert van Tricht, Limburg (Netherlands), c. 1500.. Brass is an alloy of copper and zinc, in proportions which can be varied to achieve different colours and mechanical, electrical, acoustic and chemical properties, [1] but copper typically has the larger proportion, generally 66% copper and 34% zinc.
Most exacting standards are applied to cast valves. Unfortunately, normal sliver soldering and excessive soft solder heating destroys the CR properties. Arsenic brass is used during manufacture of plumbing stock, then the annealing is performed. Waste brass fittings do not need to be CR/DN. CR brass items are usually stamped with DR, DRZ, CER ...
U.S. government bronze specification H is composed of 83% copper, 14% tin, 3% zinc, and 0.8% phosphorus. [4] Red brass is used to produce pipes, valves, and plumbing fixtures and is considered to offer a good mixture of corrosion resistance, strength and ease of casting. [5] It typically contains 85% copper, 5% tin, 5% lead, and 5% zinc.
To combat this, arsenic or tin can be added to brass, or gunmetal can be used instead. Dezincification resistant brass (DZR), also known as Brass C352 is an alloy used to make pipe fittings for use with potable water. Plumbing fittings that are resistant to dezincification are appropriately marked, with the letters "CR" (Corrosion Resistant) or ...
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