Jul,02

API 2B 2002 pdf download

API 2B 2002 pdf download

API 2B 2002 pdf download.Specification for the Fabrication of Structural Steel Pipe.
1 Scope 1.1 This specification covers the fabrication of structural steel pipe formed from plate steel with longitudinal and cir- cumferentialbutt-welded seams, typically in sizes 14 in. out- side diameter (OD) and larger (40 in. and larger for LWDS) with wall thickness 3/8in. and greater (up to a nominal 40 ft in length) suitable for use in construction of welded offshore structures. The use ofthe ERW process or spiral welded pipe is notincluded in this specification. Pipe fabricated under this specification is intended to be used primarily in piling and main structuralmembers, including tubular truss connections, where intemal stiffenersare not usually required. 1.2 Manufacturers desiring to apply the API Monogram to the products covered by this specification shall demonstrate to the satisfaction of the American Petroleum Institute a pro- gram of education, training, experience, and/or examination assuring themanufacturer’s personnel are competent inweld- ing, inspection, nondestructive examination, and testing required orreferencedby this specification. 2 References The following specifications and standards become a part of and shall be considered concurrently with this specification: ASTMI A 6-99 General Requirementsfor Rolled Steel Plates, Shapes. Sheet Piling, and Barsfor Structural Use GeneralRequirements for Delivery ofSteel Platesfor Pressure Vessels A 20-99 A370-97 E 23-98 Mechanical Testing ofSteel Products Notched Bar Impact TestingofMetallic Materials
3.2 fabricator: The person, firm, company, or corpora- tion executingthe contractor agreement with thepurchaserto fabricatethe structural steel pipe under this specification. 3.3 girth weld: A circumferential butt-welded seam lying in a plane perpendicular to the longitudinal axis of the pipe, used to join tubular sections into lengths of straight pipe. 3.4 longitudinal seam: A butt-weldedseamwhichpar- allels the axis of the pipe. 3.5 longitudinally welded double seam (LWDS) pipe: A can with two longitudinal seams, one ofwhich may be made in the flat plate condition. 3.6 manufacturer: The firm, company, or corporation- furnishing plate steel used in the fabrication of the structural steel pipe. 3.7 mill pipe: A structural steel pipe consistingofmultiple cansjoined by girth welds. 3.8 pile: A cylindrical tubular member fabricated from one or more lengths of structural steel pipe, usually driven through a leg or sleeve of an offshore platform, that carries vertical loads and resists lateral forces. 3.9 pipe weld: A longitudinal seam made after the plate has been formed into pipe. 3.10 plate weld: A longitudinal seam made between flat plates which are subsequently formed into pipe. 3.11 purchaser: The person, firm, company,or corpora- tion entering into a contract or agreement for the purchaseof structural steel pipe fabricated under this specification. 3.12 single seam welded pipe: A can withone longitu- dinal seam, produced by a continuous welding process. 3.13 structural steel pipe: A cylindricaltubularmem- ber formed from steel plate, having a uniform material and wall thickness, with longitudinal and/or circumferential butt welded seams, comprising of the following types: can, single seam welded pipe, longitudinally welded double seam (LWDS) and mill pipe.
5 Fabrication 5.1 GENERAL 5.1.1 Fonning pipe furnishedto this specificationshall nor- mally be fonned below 400°F, that is, cold fonned. Wann fonning (between800°F and 1200°F or 50°F below the tem- pering temperatureofquenched and tempered steels) may be employed provided forming procedures for heat treated or TMCP steel are qualified to demonstrate the mechanical strength propertiesrequiredby the original plate specification are met in the wann fonned condition. Hot forming (above the upper critical temperature) may also be employed pro- vided the forming procedure is qualified to demonstrate all mechanical propertiesrequired by the original plate specifica- tions are met 5.1.2 The purchaser may specify Supplementary Require- ment I ifthe rolled direction ofthe plate is desired to be ori- ented in a specific direction during the fonning of the pipe, and the pipe shallbe so identified. 5.1.3 All welding shaIl be in accordance with AWS DU- 2000, Structural Welding Code-Steel. Unless otherwise approved by the purchaser, the submerged arc welding pro- cess shall be employed for all welding-except tack welds, root passes and repair welding where other AWS approved processes may be utilized. All welds shall be completejoint penetration groovewelds produced by employing AWS D1.1 prequalifiedjoint details, or other joint configurations quali- fiedby procedurequalificationtesting.

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