Flange Summary Data Sheet
ASTM A 105
Scope
This standard covers forged carbon steel piping components for ambient- and higher-temperature service in
pressure systems. Flanges are ordered either to dimensions specified by the purchaser or to dimensional specifications such as ASME 16.5 and API 6A. Forgings made to
ASTM A 105 are normally limited to a maximum weight of
10,000 lb.
Manufacture
ASTM A 105 covers the requirements for forged steel components as finished products only.
The requirements for raw materials are covered by the
standards specified in Section 2: Referenced Documents
of ASTM A 105.
Heat Treatment
Heat treatment is not a mandatory requirement of this
specification except for the following piping components:
* Flanges above Class 300,
* Flanges of special design where the design pressure at
the design temperature exceeds the pressure-temperature
ratings of Class 300, Group 1.1,
* Flanges of special design where the design pressure or
design temperature is not known.
Heat treatment, when required by the above, shall be
annealing, normalizing, normalizing and tempering, or
quenching and tempering in accordance with ASTM A
961.
Certification
For forgings made to specified dimensions agreed upon
by the purchaser, and for forgings made to dimensional
standards, the application of identification marks, as
required by ASTM A 961, shall be the certification that the
forgings have been furnished in accordance with the
requirements of this standard. The specification designation included on test reports shall include the year of
issue and revision letter, if any.
T
est Reports: When test reports are required, Weldbend
will also provide the following, if applicable:
*Type of heat treatment,
*Tensile property results, i.e., yield strength and ultimate
strength in ksi, elongation and reduction in area, in percent,
*Chemical analysis results,
*Hardness results, and,
*Any supplementary testing required by the purchase
order.
Product Marking
All flanges shall have the prescribed information stamped
or otherwise suitable marked on each flange in accordance with the Standard/MSS SP-25. A Weldbend flange
is marked as follows:
Weldbend’s Name, Nominal Pipe Size, A105/SA105, Bore
Designation, Heat Identification Number and manufacture date.
E
ven with all the advances in technology today,
the wholly welded piping system has for
decades remained the best choice for use in
high pressure and high temperature application.
Many piping jobs in schools, industrial plants, refineries, and factories have benefited from the inherent
advantages of a completely welded system. It
becomes a closed container joining pipes, valves, fittings, and flanges. A welded joint actually becomes
part of the pipe, minimizing leak potential
. This provides greater margins of safety, especially under conditions of high internal pressures. Additionally, welding fittings form a continuous metal structure with the
pipe, adding forged-in strength to any piping system.
Furthermore, smooth forged flanges simplify insulation and take up less space.
Mechanical requirements:
Tensile Strength (min) 70,000 psi
Yield Strength (min) 36,000 psi
Basic minimum elongation 30%
for walls
5/16 in. and over
in thickness, strip tests.
Reduction of area (min) 30%
Hardness, HB (max) 187
Chemical requirements
(in %):
Carbon Manganese Phosphorus (max) Sulfur (max)
.35 max .60-1.05 .035 .040
Silicon
Copper
Nickel Chromium
.10-.35 .40 max .40 max .30 max
Mol
ybden
um Vanadium Columbium
.12 max .08 max .02 max
Note: All information contained in this document, and for a complete description of all requirements, refer to ASTM A 105. Sheets are subject to change without notice.
Dimensions
Weldbend flanges are manufactured in accordance with
ASME B 16.5 (24” NPS and smaller) and ASME B 16.47
(26” - 60” NPS).
Materials
Weldbend flanges are made by hammering, pressing,
rolling and/or machining cast or forged bars, billets or
slabs. These adhere to the extent described in the following sections.
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