Elbow: in the pipeline system, connecting the two public that bore the same or different tube, so that the pipeline for a certain
angle turn fittings.
Elbow: by point of view, the most commonly used 45 °, 90 ° and 180 ° of three, including the elbow of the other non-normal angle of
60 °, etc. In addition, based on the engineering needed.
The way of the pipe coupling: soldered directly to the (most common way), flanged, threaded coupling socket type links, etc.
In accordance with the production process can be divided into: welding elbow, punch, elbow, casting elbow.
Material divided as follows: carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum and other. (But are pure wooden
factory forgings)
Production methods can be divided into: push the system, pressing, forging, casting and so on. (Generally pure forging)
Manufacturing standards: GB, standard electric, water standard, American standard, German standard, Japanese standard and so on.
: The radius of curvature can be divided into long-radius elbows and short radius elbow. Long radius elbows its radius of curvature is
equal to 1.5 times the outer diameter of the tube, ie, r = 1.5d. The short radius elbow and its radius of curvature equal to the tube
outer diameter, r = 1.0d. (D elbow diameter, r is the radius of curvature).
Pressure levels: about seventeen, and pipe standards in the United States is the same, there are: sch5s, sch10s, sch10, sch20, sch30,
sch40s, std, sch40, sch60, sch80s, xs; sch80, sch100, sch120 One of the most commonly used, sch140, sch160, xxs; both std and xs.
Technical requirements: Most of pipe fittings used in welding, in order to improve the welding quality, the end of the car into a
groove, leaving a certain angle with a certain edge, this one requires strict side thick, angle and the deviation range are provided.
Surface quality and mechanical properties and the tube is the same. In order to easily weldable, steel pipe fittings and the hose
connected to the same.
Packaging requirements for a small tube, such as export, you need to do wooden box about 1 cubic meter, the provisions of the elbow
about the number in this box can not be more than one t, the standard allows the suit, that is, a large set of small, but the total The
weight is generally not more than 1 ton. For large y we should single package, like the 24 "must be a single package. Packaging mark,
mark to indicate the size, steel grade, batch number, manufacturer trademark.
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