Jun,30

API Std 1104-2005 pdf download

API Std 1104-2005 pdf download

API Std 1104-2005 pdf download.Welding of Pipelines and Related Facilities.
3 Definition of Terms 3.1 GENERAL The welding terms used in this standard are as defined in AWS A3.0, with the additions and modifications given in 3.2. 3.2 DEFINITIONS 3.2.1 automatic welding: Arc welding with equipment that performs the entire welding operation without manual manipulation of the arc or electrode other than guiding or tracking and without a manual welding-skill requirement of the operator. 3.2.2 branch weld: The completed weld joining a branch pipe or branch fitting to a run pipe. 3.2.3 company : The owner company or the engineering agency in charge of construction. The company may act through an inspector or another authorized representative. 3.2.4 contractor: Includes the primary contractor and any subcontractors engaged in work covered by this standard. 3.2.5 defect: An imperfection of sufficient magnitude to warrant rejection based on the stipulations in this standard. 3.2.6 imperfection: A discontinuity or irregularity that is detectable by methods outlined in this standard. 3.2.7 indication: Evidence obtained by nondestructive testing. 3.2.8 internal concavity: A bead that is properly fused to and completely penetrates the pipe wall thickness along both sides of the bevel, but whose center is somewhat below the inside surface of the pipe wall. The magnitude of concav- ity is the perpendicular distance between an axial extension of the pipe wall surface and the lowest point on the weld bead surface.
3.2.9 mechanized welding: A process where parame- ters and torch guidance are controlled mechanically or elec- tronically but may be manually varied during welding to maintain the specified welding conditions. 3.2.10 position welding: Welding in which the pipe or assembly is not rotating while the weld is being deposited. 3.2.11 qualified welder: A welder who has demon- strated the ability to produce welds that meet the require- ments of Sections 5 or 6. 3.2.12 qualified welding procedure: A tested and proven detailed method by which sound welds with suitable mechanical properties can be produced. 3.2.13 radiographer: A person who performs radio- graphic operations. 3.2.14 repair: Any rework on a completed weld that requires welding to correct a fault in the weld that has been discovered by visual or nondestructive testing and is beyond this standard’s limits of acceptability. 3.2.15 roll welding: Welding in which the pipe or assem- bly is rotated while the weld metal is being deposited at or near the top center. 3.2.16 root bead: The first or stringer bead that initially joins two sections of pipe, a section of pipe to a fitting, or two fittings. 3.2.17 semiautomatic welding: Arc welding with equipment that controls only the filler-metal feed. The advance of the welding is manually controlled. 3.2.18 shall: Term that indicates a mandatory require- ment. The term should indicates a recommended practice. 3.2.19 weld: The completed weld joining two sections of pipe, a section of pipe to a fitting, or two fittings. 3.2.20 welder: A person who makes a weld. 4 Specifications 4.1 EQUIPMENT Welding equipment, both gas and arc, shall be of a size and type suitable for the work and shall be maintained in a condi- tion that ensures acceptable welds, continuity of operation, and safety of personnel. Arc-welding equipment shall be operated within the amperage and voltage ranges given in the qualified welding procedure.
4.2.3.2 Storage and Handling Shielding gases shall be kept in the containers in which they are supplied, and the containers shall be stored away from extremes of temperature. Gases shall not be field intermixed in their containers. Gases of questionable purity and those in containers that show signs of damage shall not be used. 5 Qualification of Welding Procedures for Welds Containing Filler-metal Additives 5.1 PROCEDURE QUALIFICATION Before production welding is started, a detailed procedure specification shall be established and qualified to demonstrate that welds with suitable mechanical properties (such as strength, ductility, and hardness) and soundness can be made by the procedure. The quality of the welds shall be deter- mined by destructive testing. These procedures shall be adhered to except where a change is specifically authorized by the company, as provided for in 5.4. 5.2 RECORD The details of each qualified procedure shall be recorded. The record shall show complete results of the procedure qual- ification test. Forms similar to those shown in Figures 1 and 2 should be used. The record shall be maintained as long as the procedure is in use. 5.3 PROCEDURE SPECIFICATION 5.3.1 General The procedure specification shall include the information specified in 5.3.2, where applicable. 5.3.2 Specification Information 5.3.2.1 Process The specific process or combination of processes used shall be identified. The use of a manual, semiautomatic, mechanized, or automatic welding process or any combina- tion of these shall be specified.

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