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ASTM A 707/A 707M Document Information:
Title
Standard Specification for Forged Carbon and Alloy Steel Flanges for Low- Temperature Service
ASTM International
Publication Date:
Sep 10, 2002
Scope:
This specification covers forged carbon and alloy steel flanges
intended primarily for petroleum and gas pipelines in areas subject
to low ambient temperatures. Included are flanges to specified
dimensions or to dimensional standards such as those MSS, ASME, and
API specifications that are referenced in Section 2.
Supplementary requirements are provided for use when additional
requirements are desired. These shall apply only when specified
individually by the purchaser in the order.
Eight grades, four yield-strength classes, and three different
notch toughness levels are included.
The availability of a particular size of flange of a specific
grade and class is limited only by the capability of the
composition to meet the specified mechanical property requirements.
However, current practice normally limits the following:
(a) Grade L1 to Classes 1 and 2,
(b) Grade L2 to Classes 1, 2, and 3,
(c) Grade L3 to Classes 1, 2, and 3,
(d) Grade L4 to Classes 1, 2, and 3,
(e) Grade L7 to Classes 1 and 2, and
(f) Grades L5, L6, and L8 are generally available in
any class.
This specification is expressed in both inch-pound units and in
SI units. However, unless the order specifies the applicable "M"
specification designation (SI units), the material shall be
furnished to inch-pound units.
The values stated in either inch-pound units or SI units are to
be regarded separately as standard. Within the text, the SI units
are shown in brackets. The values stated in each system are not
exact equivalents; therefore, each system must be used
independently of the other. Combining values from the two systems
may result in nonconformance with the specification.
Keywords:
- carbon equivalent
- piping applications
- pressure containing parts
- residual elements
- steel flanges
- steel forgings, alloy
- steel forgings, carbon
- temperature service applications
- low
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