Inspection & Testing

Correction of welds containing defects

All repairs shall be carried out in accordance with proven procedures. Welds made up of cracks shall not be fixed, until eventually the purpose for the cracking has been determined. If essential, the defective component of the weld shall be cut out for further examination. Crater cracks could be fixed by grinding adopted by NDT and subsequent repair [...]

Welding Defects Detection and Inspection

Visual Inspection Prior to any welding, the resources really should be visually inspected to see that they are clear, aligned correctly, machine settings, filler assortment checked, and so on. As a 1st phase of inspection of all accomplished welds, visual inspected under superior lighting ought to be carried out. A magnifying glass and straight edge [...]

Impact Testing and Metallographic Examination

There are two ways that an impact test can be used in specifying material or qualifying a procedure: test at conditions known to detect unacceptable material, for example, excessive ferrite or the presence of intermetallic phases; demonstrate that a fabrication has properties sufficient for the intended service. For the first use, ASTM A 923 provides [...]

Definition and Purposes of Standard & Code

Standards Documents prepared by a professional group having requirements believed to be good and proper engineering practice and which are written with mandatory requirements (i.e., the verb shall is used) or Something that is established by authority, custom, or general concern as a model or example to be followed. Example; ASTM, AWWA, MSS, API 620/650, [...]

Qualifying Welding Procedures By Test

Conducting qualification tests — There are two primary reasons why welding procedures may be qualified by test. First, it may be a contractual requirement. Secondly, one or more of the specific conditions to be used in production may deviate from the prequalified requirements. In either case, a test weld must be made prior to the establishment of [...]

American Society of Mechanical Engineers (ASME) Code

The American Society of Mechanical Engineers set up a committee in 1911 to formulate standard rules for the construction of steam boiler and other pressure vessels. This committee is now called the Boiler and Pressure Vessel Committee. The committee’s function is to establish rules of safety governing the design, fabrication and inspection [...]