Coverage This specification covers seamless and welded clad steel line pipe and lined steel line pipe with enhanced corrosion resistant properties suitable for use in pipeline transportation systems in the petroleum and natural gas industries. The clad and lined steel line pipe specified herein is composed of a carbon steel backing or base material outside (in some cases inside and/or outside) and a corrosion-resistant alloy (CRA) layer or lining inside of the pipe. The base material conforms to API 5L@ PSL 2 and applicable annex(es)@ except as modified herein. The delivered product usually has square ends@ but other special ends may be furnished by agreement between the purchaser and manufacturer. Included are NPS 25 mm (1 in.) through 2134 mm (84 in.). Sizes greater than 2134 mm (84 in.) are outside of the range of API 5L but may be supplied up to 2500 mm (100 in.) by agreement@ including requirements for materials. Grades of base material covered by this specification include 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@ 2262@ UNS S317030@ UNS N08904@ Alloy 59 (UNS N06059)@ Alloy 254 SMO? 1 (UNS S31254)@ AL6NX (UNS N08367) and 1.4529 (UNS N08926). Other grades are subject to agreement between the purchaser and the manufacturer. General This specification is under the jurisdiction of the API Committee on Standardization of Tubular Goods. The purpose of this specification is to provide standards for pipe with enhanced corrosion resistance suitable for use in conveying gas@ water@ and oil in both the oil and natural gas industries. Although the plain-end line pipe meeting this specification is primarily intended for field make-up by circumferential welding@ the manufacturer will not assume responsibility for field welding. The size designations are nominal pipe sizes. In the text@ 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. 1 This term is used as an example only@ and does not constitute an endorsement of this product by API.