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Understanding Pipe Fittings - I676DDD - 09-13-2021
Understanding Pipe Fittings
Pipe fittings are components used to join pipe sections together with other fluid control products like valves and pumps
to create pipelines. The common connotation for the term fittings is associated with the ones used for metal and plastic
pipes which carry fluids. There are also other forms of pipe fittings that can be used to connect pipes for handrails and
other architectural elements, where providing a leak-proof connection is not a requirement. Pipe
link fittings may be welded or threaded, mechanically
joined, or chemically adhered, to name the most common mechanisms, depending on the material of the pipe.
There is some inconsistency in terminology surrounding the terms pipe, tube, and tubing. Therefore, the term pipe
fittings will sometimes be mentioned in the context of tubing as well as pipe. While similar in shape to tube fittings, pipe
fittings are seldom joined by methods such as soldering. Some methods overlap, such as the use of compression
power fittings, but where these are commonplace for
connecting tubes or tubing, their use in pipe connections is rarer. It suffices to say that while there are general
distinctions, the common usage of terms can differ from supplier to supplier, although they represent the same items.
Pipe Fittings Explained: Fitting Materials and Manufacturing Processes
Cast and malleable iron
Fittings for cast iron pipe fall under hubless and bell-and-spigot styles. Hubless designs rely on elastomeric couplers
that are secured to the outer diameters of the pipe or fitting by tension clamps, usually a stainless steel band clamp that compresses the elastomeric material and forms a seal.
These hubless or no hub designs are sometimes referred to as rubber pipe couplings or rubber plumbing couplings and are
especially popular for transitioning from one material to another—from copper to cast iron, for instance. Bell-and-spigot,
or sometimes, hub-and-spigot, overhead line fittings
are joined today primarily with elastomeric gaskets that fit inside the bell and accommodate the insertion of the
plain pipe end or fitting. Older systems before the 1950s were caulked using a combination of molten lead and a fibrous
material such as oakum. Cast iron pipe is sometimes joined with bolted flanges, or in some cases, mechanical compression
connections. Flanged joints employed in underground applications can subject the pipe to settlement stresses unless the pipe
is adequately supported.
The anti-vibration hammer is designed to
reduce wind-induced wire vibration. High-voltage overhead lines have high pole positions and large spans. When the wire is
subjected to wind, it vibrates. When the wire vibrates, the working conditions at the wire suspension are the most
unfavorable. Due to multiple vibrations, the wire will be fatigue damage due to periodic bending. When the span of the
overhead line is greater than 120 meters, vibration-resistant hammers are generally used to prevent vibration. The
installation position of the anti-vibration hammer should be determined according to the construction requirements. After the
anti-vibration hammer is installed, it can produce the movement opposite to the vibration of the wire, thus eliminating or
weakening the vibration of the wire.
Pole Line Hardware is Used in Multiple Industries
Pole line hardware is used in industries such
as telecommunication, aviation, electrical, automotive, fabrication, marine, medical, mining and aerospace. This hardware is
made of various materials including steel, aluminum, platinum, silver, titanium and copper.
Manufacturers of pole line hardware have been in existence since the 19th century. As such, the manufacture and design of
pole line hardware has improved over time. It is important to understand the different specifications and requirements of
your cables. Choosing fasteners that are suited to these exact tolerances is crucial to ensure stability.
Since pole lines support and distribute utilities for long periods of time, the hardware used in the making of pole lines
must be subjected to tests that enhance strength and eliminate the possibility of weakness. These tests include wet and dry
AC withstands, thermal imaging, compression, radio interference voltage and partial voltage tests.
With daily advancements in technology, distributors of pole line utilities have embraced safety and efficiency that goes
a long way in serving the general population. AMAC Equipment supplies tested and true high-quality hardware like crossover
clamps and drops hardware to suit multiple applications in the field.
Bolts are one of the most common elements used in
construction and machine design. They hold every-thing together – from screws in electric toothbrushes and door hinges to
massive bolts that secure concrete pillars in buildings. Yet, have you ever stopped to wonder where they actually came from?
What the majority of researchers on this topic do agree on, though, is that it was the Industrial Revolution that sped up
the development of the nuts and bolts and put them firmly on the
map as an important component in engineering and construction world.