API SPEC 5LD – 2009 pdf download.Specification for CRA Clad or Lined Steel Pipe.
2.3 Normative Standards The most recent editions of the following standards contain provisions that, through reference in this text, form a part of this standard. API Specification 5L, Specification for Line Pipe API Specification 5LC, Specification for CRA Line Pipe API Standard 1104, Welding Pipelines and Related Facilities ASME Boiler and Pressure Vessel Code (BPVC) 2 , Section II, Part C: Specifications for Welding Rods, Electrodes and Filler Metals ASME BPVC, Section IX: Welding and Brazing Qualifications ASTM A240 3 , Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications ASTM A262, Standard Practices for Detecting Susceptibility of Intergranular Attack in Austenitic Stainless Steels ASTM A264, Specification for Stainless Chromium-Nickel Steel Clad Plate ASTM A265, Standard Specification for Nickel and Nickel-Base Alloy-Clad Steel Plate ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products ASTM A578, Standard Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications ASTM A751, Standard Test Methods, Practices and Terminology for Chemical Analysis of Steel Products ASTM B424, Standard Specification for Ni-Fe-Cr-Mo-Cu Alloy (UNS N08825 and UNS N08221) Plate, Sheet, and Strip ASTM B443, Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNS N06625) and Nickel- Chromium-Molybdenum-Silicon Alloy (UNS N06219) Plate, Sheet, and Strip ASTM B499, Standard Test Method for Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on Magnetic Basis Metals ASTM E92, Standard Test Method for Vickers Hardness of Metallic Materials
3 Definitions and Acronyms 3.1 Definitions For the purposes of this specification the following definitions apply. 3.1.1 backing steel The outer wall thickness pipe of a clad or lined pipe (for pipe clad on the outside and inside, the backing steel is the core material). NOTE Backing steel is sometimes referred to as base material or steel backing. 3.1.2 clad cladding Refers to a metallurgically-bonded CRA layer produced by roll bonding, weld overlaying, powder metallurgy or explosively cladding a carbon steel plate or pipe. 3.1.3 CRA layer A general term referring to any internal corrosion resistant alloy layer. 3.1.4 lined Refers to a mechanically expanded, fitted or installed (“mechanical bond”) CRA layer with a carbon backing steel. 3.1.5 manufacturer As used throughout this specification refers to the firm, company, or corporation responsible for marking the product and warrants that the product conforms to the specification. The manufacturer is responsible for compliance with all of the applicable provisions of the specification. 3.1.6 pipe mill A firm, company, or corporation that operates pipe-making facilities.
5.4 Heat Treatment Pipe furnished to this specification may be as-rolled, solution-annealed (for the CRA liner), normalized, TMCP, TMCP with accelerated cooling, or quench-and-tempered. For lined pipe, heat treatment may be applied to the outer pipe and the inner pipe, individually, before inserting the liner. The CRA inner pipe shall be supplied in the solution annealed condition unless otherwise agreed. Other appropriate heat treatments may be agreed upon between purchaser and manufacturer. NOTE In order to ensure that satisfactory corrosion properties are consistently achieved in the clad layer, it is important to generate a high level of reproducibility in any heat treatment cycle. Consequently, the manufacturer should minimize the heat treatment time and temperature tolerances. Following heat treatment, the CRA material shall demonstrate appropriate microstructure and anti-corrosion properties. 6 Chemical Properties and Tests 6.1 Composition The composition of the CRA layer furnished to this specification, as determined by heat or deposit analyses, shall conform to the chemical requirements specified in Table 1. Chemical composition of the as deposited overlay of the seam or girth weld (in the case of a jointer) shall be within the tolerances of the clad layer or as agreed upon between the purchaser and manufacturer. When agreed and specified on the purchase order or data sheet, the chemical composition of any CRA cladding or liner may be further restricted by specification of a minimum PREN [%Cr + 3.3%Mo + 16%N] or PREW [%Cr + 3.3 (%Mo + 0.5%W) + 16%N] value. If this is the case the actual values shall be reported on the material test certificate.