This Standard covers ratings, overall dimensions, testing, tolerances,
and markings for wrought
carbon and alloy steel buttwelding short radius elbows and returns.
The term wrought denotes
fittings made of pipe, tubing, plate, or forgings.
Fabricated fittings employing intersection welds are not covered by
this Standard. Design of such
fittings is covered in the ASME B31, Code for Pressure Piping or the
ASME Boiler and Pressure
Referenced Standards. Standards and specifications adopted by
reference in this Standard are shown
in Annex B, which is part of this Standard. It is not considered
practical to identify the specific
edition of each standard and specification in the individual
references. Instead the specific
edition reference is identified in Annex B. A product made in
conformance with a prior edition of
reference standards and in all other respects conforming to this
Standard will be considered to be
Codes and Regulations. A fitting used under the jurisdiction of the
ASME Boiler and Pressure Vessel
Code, the ASME Code for Pressure Piping, or a governmental regulation
is subject to any limitation
of that code or regulation. This includes any maximum temperature
limitation or rule governing the
use of a material at low temperature.
Criteria for selection of fitting types and materials suitable for
particular fluid service are not
within the scope of this Standard.
Installation welding requirements are outside the scope of this
Standard. Installation welding
shall be done in accordance with the applicable piping code or
regulation covering the piping
system into which the fittings are installed.
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