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ASME B16.9 Stainless Elbow, ASTM A815 S32750 90°, 2 Inch, SCH40 STD
In the pipeline system, the elbow is a pipe fitting that changes
the direction of the pipeline. 45 and 90 by angle Three of the most
commonly used, in addition to engineering needs including 60 other
abnormal angle elbow. The elbow materials are cast iron, stainless
steel, alloy steel, malleable cast iron, carbon steel, non-ferrous
metals and plastics.
The way to connect with the pipe is: direct welding (the most
commonly used way) flange connection, hot melt connection, fused
connection, thread connection and socket connection. According to
the production process can be divided into: welding elbow, stamping
elbow, push elbow, casting elbow, butt welding bend, etc. Other
name :90 degree bend, right angle bend, etc.
stamping forming elbow is the earliest forming process used in
batch production of seamless elbow. it has been replaced by hot
push method or other forming process in the production of elbow of
common specifications, but in some specifications of elbow due to
less production quantity, too thick wall thickness or too thin.
The product is still in use when it has special requirements. The
punching forming of the elbow adopts the pipe billet equal to the
outer diameter of the elbow, and the press is used to press the die
directly.
Before stamping, the tube billet is placed on the lower die, the
inner core and the end die are loaded into the tube billet, the
upper die moves down and begins to press, and the elbow is formed
by the constraint of the outer die and the support of the inner
die.
Compared with the hot push process, the appearance quality of
stamping forming is not as good as that of the former, and the
outer arc of stamping elbow is in the tensile state when forming,
and there is no extra metal in other parts to compensate, so the
wall thickness at the outer arc is about 10% thinner. But because
it is suitable for single piece production and low cost, stamping
elbow process is mostly used in the manufacture of small batch and
thick wall elbow.
Stamping elbows are divided into cold stamping and hot stamping,
usually according to the material properties and equipment capacity
to choose cold stamping or hot stamping.
The forming process of cold extrusion elbow is to use a special
elbow forming machine to put the tube billet into the outer die.
After the upper and lower die is molded, the tube billet moves
along the gap reserved for the inner die and the outer die under
the push rod.
The elbow made by internal and external die cold extrusion process
is beautiful in appearance, uniform in wall thickness and small in
size deviation. The precision of internal and external die used in
this process is high, and the deviation of wall thickness of pipe
billet is also harsh.
Foreign Language | elbow | attended mode | Direct welding flange connections |
alias;another name;byname | forge and press;forge and stamp | classify;classification;assortment | Welding elbow, punching elbow, pushing elbow, etc |
angle;point of view | 45 and 90 180 Three most commonly used | apply;use;application;appliance | Plumbing installation |