AWS API-M pdf free download
AWS API-M pdf free download.Welding of Pipelines and RelatedI Facilities.
The definitions of welding terms in this section of API 1104 are based Ofl definitions in AWS A3.O, Siandard Welding Terms and Definitions, with additions and modificalions. Additional key terms and definitions not included in this section of the code appear below:
Bend test. A soundness test in which the individual performing the test places the specimen across the shoulders of a die with the surface to he tested facing down. A plunger positioned above the area of interest is forced toward the die, causing the specimen to bend into a U shape.
butt weld. A nonstandard term for a weld in a butt joint, which is a joint between two members aligned approximately in the same plane.
classification number. A number in an AWS numbering system that identifies electrodes and filler metals according to their chemical composition and operating characteristics. Examples include for SMAW—E70l 8. for GMAW—ER7OS-6. and for GTAW—EWTh-2.
defect. A rejectahie imperfection that impairs the suitability of a structure for its intended purpose. See API 1104 Section 9 for a list of types of imperfections.
destructive testing. Testing that renders the material or part useless for service, performed to obtain information on material properties and soundness.
discontiiiuity. An irregularity in an otherwise uniform structure. See API 1104 Section 9 for a list of types of imperfections and the criteria that may allow them in a weldment. API 1104 does not use the word discontinuity but rather calls them indications or imperfections. Not all discontinuities, imperfections. or indications are rejected.
essential variable. A component of a welding procedure specification that requires requalification if changed beyond certain limits specified in the applicable code.
face reinforcement. A weld metal build-up. raised above the surface of (he parent metal in excess of what is required to fill a groove joint on the side of the base metal from which welding was done.
faying surface. The mating surfaces of two parts that are to he welded together.
filler metal. The metal or alloy to he added in making a brazed, soldered, or welded joint.
fillet weld. A weld of approximately triangular cross section joining two surfaces approximately at right angles.
soundness. Freedom from imperfections.
soundness testing. See bend, nick-break, and fillet-weld break test (destructive soundness tests) and RT and UT (nondestructive soundness tests). API 1104 does not use the fillet-weld break test.
specification number. The number assigned to a document that describes the attributes of some item or operation. Examples include AWS A5. 1. SpecUlcalion for Covered carbon Steel Arc Welding Electrodes. ASTM A 514. Standard Spedfication for High Yield Sirengili. Quenched and Tempered Alloy Sk’el Plate, and AWS D 1 4.4. Specification for Welded Joints in Machinery and Etiiipmt’iii.
speed of travel. The rate of welding progression along the weld joint.
tensile-strength test (also called tension test). A test in which the specimen is subjected to a pulling load until failure occurs. Test results are expressed in pounds per square inch (psi) or megapascals (MPa).
trepanning. A process (using a hole saw) for removing a specimen from a weld for examination of the weld metal. The hole is cut so the inspector can look inside the pipe to verify the degree of penetration. Trepanning is generally not permitted for production piping applications. See Study Guide Figure 3.3.AWS API-M pdf download.
