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304 Stainless Steel Wire Elbow Internal Thread Elbow 90 ° 45 ° Stainless Steel Wire Buckle Elbow 4 90 ° DN25
1. Since most pipe fittings are used for welding, in order to
improve the welding quality, the end parts are beveled, with a
certain Angle and a certain edge. This requirement is also strict.
The surface quality and mechanical properties are basically the
same as pipes. For the convenience of welding, the pipe fittings
are of the same steel grade as the pipe to be connected.
2. All pipe fittings should be surface treated. The iron oxide on
the inner and outer surfaces should be sprayed off by shot peening,
and then coated with anticorrosive paint. This is for export needs,
moreover, in order to facilitate transportation to prevent
corrosion and oxidation, we must do this work.
3, is the packaging requirements for small pipe, such as export,
you need to do wooden cases, about 1 cubic meter, the number of
elbows in the box can not exceed about a ton, the standard allows
the set, that is, a large set of small, but the total weight
generally can not exceed 1 ton. For large pieces y needs to be
packed individually, like 24 "must be packed individually. Another
is the packaging mark, the mark is to indicate the size, steel
number, batch number, manufacturer's trademark, etc.
Production methods can be divided into pushing, pressing, forging,
casting and so on.
According to the manufacturing standard, it can be divided into GB
standard, electric standard, ship standard, chemical standard,
water standard, American standard, German standard, Japanese
standard, Russian standard, etc.
According to its radius of curvature, it can be divided into long
radius elbow and short radius elbow. The long radius elbow refers
to the outer diameter of the pipe whose radius of curvature is
equal to 1.5 times, that is, R=1.5D; Short radius elbow means that
its radius of curvature is equal to the outer diameter of the pipe,
that is, R= 1.0d. (D is elbow diameter, R is radius of curvature).
According to the pressure grade, there are about 17 kinds of tubes,
which are the same as American standards, including Sch5s, Sch10s,
Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80,
SCH100, Sch120, Sch140, Sch160, XXS The two most commonly used are
STD and XS.
According to different shapes and uses, it can be divided into:
groove elbow, card sleeve elbow, double socket elbow, flange elbow,
reducing elbow, fixed seat elbow, internal and external tooth
elbow, stamping elbow, push elbow, socket elbow, butt welding
elbow, inner wire elbow and so on.