scope:

COVERAGE

This specification covers seamless, centrifugal cast, and welded clad steel line pipe and lined steel pipe with improved corrosion resistant properties. The clad and lined steel line pipe specified herein shall be composed of a base metal outside and a corrosion-resistant alloy (CRA) layer inside the pipe. The base material shall conform to API Spec 5L except as modified herein.

The primary product has square ends, but other special end preparation may be furnished by agreement between the purchaser and manufacturer. Included are NPS: 1 in. through 42 in.

Grades of base metal covered by this specification are X42, X46, X52, X56, X60, X65, X70 and X80 and grades intermediate to these. Grades of the CRA layer are LC 1812, 2205, 2506, 2242, and 2262 and other grades which are subject to agreement between the purchaser and the manufacturer.

GENERAL

a. This specification is under the jurisdiction of the Committee on Standardization of Tubular Goods.

b. The purpose of this specification is to provide standards for pipe with improved corrosion resistance suitable for use in conveying gas, water, and oil in both the oil and natural gas industries.

c. Although the plain-end line pipe meeting this specification is primarily intended for field makeup by circumferential welding, the manufacturer will not assume responsibility for field welding.

d. The size designations are nominal pipe sizes. In the text paragraphs herein, where pipe size limits (or size ranges) are given, these are outside-diameter sizes except where stated to be nominal. These outside-diameter size limits and ranges apply also to the corresponding nominal sizes.

METRIC UNITS

Metric units in this specification are shown in parentheses in the text and in many tables. Outside diameters and wall thicknesses are converted from inch dimensions. The converted diameters are rounded to the nearest 0.1 mm for diameters less than 18 in., and to the nearest 1.0 mm for diameters 18 in. and larger. Wall thicknesses are rounded to the nearest 0.1 mm.

Metric plain-end weights are calculated from the metric outside diameters and wall thicknesses using the formula in 9.1 and rounded to the nearest 0.01 kg/m.

Metric hydrostatic pressures are calculated from metric outside diameters and wall thicknesses and metric fiber stresses shown in Sec. 8.

The factors used where conversions are appropriate are as follows:

The following formula was used to convert degrees Fahrenheit (°F) to degrees Celsius (°C):