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ASTM A 714 Document Information:
Title
Standard Specification for High-Strength Low-Alloy Welded and Seamless Steel Pipe
ASTM International
Publication Date:
Mar 10, 1999
Scope:
This specification covers seamless and welded high-strength low-alloy
steel pipe NPS ½ to
NPS 26, inclusive. Pipe having other dimensions may be furnished
provided such pipe complies with
all other requirements of this specification. This material is
intended for pressure piping
service, and other general purposes, where savings in weight or added
durability are important.
NOTE 1 - The dimensionless designator NPS (nominal pipe size) has been
substituted in this standard
for such traditional terms as "nominal diameter," "size," and "nominal
size."
NOTE 2 - A comprehensive listing of standardized pipe dimensions is
contained in ANSI Standard
B36.10.
Class - These high-strength low-alloy steels have enhanced resistance
to general atmospheric
corrosion by weathering as commonly encountered in rural, urban,
marine, and industrial
environments. They are supplied in two classes: Class 2, having
corrosion resistance equivalent to
that of carbon steel with copper (0.20 minimum Cu); and Class 4,
having corrosion resistance
substantially better than that of Class 2 (Note 3). Class 4 steels
when properly exposed to the
atmosphere can be used bare (unpainted) for many applications.
NOTE 3 - For methods of estimating the atmospheric corrosion
resistance of low alloy steels see
Guide G 101 or actual data.
Type - Pipe may be furnished in the following types of manufacturing
processes:
Type F - Furnace-butt welded, continuous welded,
Type E - Electric-resistance welded, and
Type S - Seamless.
Pipe ordered under this specification is suitable for welding.
Type E pipe may be furnished either nonexpanded or cold-expanded at
the option of the manufacturer.
Types F, E, and S pipe are commonly furnished in nonheat-treated
condition. Type S pipe may be
furnished in normalized (or other) heat-treated condition, when so
specified.
Types F, E, and S pipe in single random lengths may be furnished with
hot-dipped galvanized coating
of zinc, subject to inquiry to the producer.
Couplings, when furnished, shall be of the same class, heat-treated
condition, and grade of
material as the pipe ordered.
Grade - This specification designates eight grades of steel
composition as listed in Table 1 and
corresponding tensile requirements for the grades as listed in Table
2.
For Class 2 pipe, Grade I, II, or III shall be specified, and
copper-bearing steel is required as
specified in Table 1.
For Class 4 pipe, Grade IV, V, VI, VII, or VIII shall be specified.
Alternatively, for Class 4,
Type S, and Type E pipe, a steel composition corresponding to a grade
listed in Table 1 of
Specification A 588/A 588M may be specified, subject to negotiation.
When Class 4 pipe is joined by welding or is used in welded
construction, the user is cautioned
that the selection of welding procedure and resultant composition of
fused metal should be suitable
for Class 4 material and the intended service.
The values stated in inch-pound units are to be regarded as the
standard.
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