Norm

ASTM A714 - 99(2009)e1 en

Standard Specification for High-Strength Low-Alloy Welded and Seamless Steel Pipe

50,60 61,23 Incl BTW

Over deze norm

Status Definitief
Aantal pagina's 8
Gepubliceerd op 01-04-2009
Taal Engels

1.1 This specification covers seamless and welded high-strength low-alloy steel pipe NPS 1/2 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.

1.2 ClassThese 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.

1.3 TypePipe may be furnished in the following types of manufacturing processes:

Type FFurnace-butt welded, continuous welded,

Type EElectric-resistance welded, and

Type SSeamless.

1.3.1 Pipe ordered under this specification is suitable for welding.

1.3.2 Type E pipe may be furnished either nonexpanded or cold-expanded at the option of the manufacturer.

1.3.3 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.

1.3.4 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.

1.3.5 Couplings, when furnished, shall be of the same class, heat-treated condition, and grade of material as the pipe ordered.

1.4 GradeThis specification designates eight grades of steel composition as listed in Table 1 and corresponding tensile requirements for the grades as listed in Table 2.

1.4.1 For Class 2 pipe, Grade I, II, or III shall be specified, and copper-bearing steel is required as specified in Table 1.

1.4.2 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.

1.5 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.

1.6 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

TABLE 1 Chemical Requirements

Composition, %
Element
Grade I
Grade II
Grade III
Grade IV
Heat
Product
Heat
Product
Heat
Product
Heat
Product
Carbon, max
0.22
0.26
0.22
0.26
0.23
0.27
0.10
0.13
Manganese
1.25 max
1.30 max
0.85 to 1.25
1.30 max
1.35 max
1.40 max
0.60 max
0.65 max
Phosphorus
...
...
0.04 max
0.05 max
0.04 max
0.05 max
0.03 to 0.08
A
Sulfur, max
0.05
0.063
0.05
0.063
0.05
0.06
0.05
0.06
Silicon
...
...
0.30 max
0.33 max
0.30 max
0.35 max
...
...
Copper
0.20 min
0.18 min
0.20 min

Details

ICS-code 23.040.10
Engelse titel Standard Specification for High-Strength Low-Alloy Welded and Seamless Steel Pipe

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