They are made up of different materials like copper, iron, brass, PVC etc. Flange fittings are generally used for connections to valves, inline instruments or equipment nozzles. Two surfaces are joined tightly together with threaded bolts, wedges, clamps, or other means of applying high compressive force. Although a gasket, packing, or O-ring may be installed between the flanges to prevent leakage, it is sometimes possible to use only a special grease or nothing at all . Although flange fittings are bulky, they perform well in demanding applications such as large water supply networks and hydroelectric systems. Elbows are used to change the direction of flow between two pipes.
china pipe fitting manufacturers
Why not take a look at our range of stainless steel products or get in touch to speak to a NERO representative today. With sealing cone screw-on ttings with O-ring (AOL / AOS), the pre-stressing of the O-ring must be bridged and the sealing cone must lie metallically ush against the cone of the HL/HS connector. Cutting ring ttings are available with a wide range of standardised screw-in threads, enabling them to be used for an enormous variety of applications. All fittings are designed to withstand the operating pressures specified in the standards, in some cases the requirements of the standard are exceeded. “plumbing – In slip joints, what’s the difference between rubber and nylon washers? – Home Improvement Stack Exchange”.
We maintain deep inventories of stainless steel fittings to provide quick shipments. These disadvantages are less problematic for fire sprinkler installations, because standing water in the steel pipes does not flow, except during occasional tests or actual activation by a fire. The introduction of oxygen dissolved in fresh supplies of water will cause some corrosion, but this soon stops in the absence of any source of further water-borne oxygen. Threaded steel pipe is widely used in buildings to convey natural gas or propane fuel, and is also a popular choice in fire sprinkler systems due to its resistance to mechanical damage and high heat .
Fasteners commonly used with piping are a stud bolt with nuts ; a machine bolt and nut; or a powder-actuated tool fastener . This fitting (also known as a “bungalow fitting” or a “cottage fitting”) is a sanitary tee that allows two trap arms to be connected at the same level. Clean-outs are fittings with removable elements, allowing access to drains without the removal of plumbing fixtures.
Unlike metal welding, solvent welding is relatively easy to perform . Solvents typically used for plastics are usually toxic and may be carcinogenic and flammable, requiring adequate ventilation. In drainage systems, it is primarily used to connect horizontal drains to vertical drains. The center connection is generally to the pipe leading to a trap . It must not connect a vertical drain to a horizontal drain, because of the likelihood that solids will accumulate at the bottom of the junction and cause a blockage.
This generally requires that the piping and fitting are the same material. Skill is required to melt the joint sufficiently to ensure good fusion, while not deforming or damaging the pieces being joined. A trap primer automatically injects water into a trap, maintaining a water seal to keep sewer gas out of buildings.
Quality GroovJoint fittings carry approvals by UL, ULC, and NSF-61. Flexible fittings may also be used to reduce transmission of vibration into the DWV system. Although the fittings are not cheap, they are reasonably durable .