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  • Basic Weld Inspection - Part 1 John Hoh Senior Staff Engineer National Board Category: Design/Fabrication Summary:This article was originally published in theFall 2009National BoardBULLETINas the first of atwo-part series. Please seeBasic Weld Inspection - Part 2for the conclusion of this article. Note: The

  • A crucial step in many welding applications, preheating slows the rate of cooling in a finished weld, lowers the amount of hydrogen in it, and reduces the risk of cracking. Artificially introducing heat into the base metal — by means of an external heat source — adds a step to the welding process; however, it can save you time and money in the long term by reducing the potential for a failed

  • Preheating involves heating the base metal, either in its entirety or just the region surrounding the joint, to a specific desired temperature, called the preheat temperature, prior to welding. Heating may be continued during the welding process, but frequently the heat from welding is sufficient to maintain the desired temperature without a continuation of the external heat source. The interpass temperature,

  • Overview of Hydrostatic Testing Hydrostatic (Hydro) Testingis a process where components such aspipingsystems, gas cylinders, boilers, andpressure vesselsare tested for strength and leaks. Hydro tests are often required after shutdowns and repairs in order to validate that equipment will operate under desired conditions once returned to service. Furthermore, hydrostatic

  • PIPING HYDROSTATIC TESTING (OVERVIEW) Pressure source and test gauge should be upstream of check valve. If pressure source is downstream, check valve should have flapper removed or jacked?up. (Pressure must be released downstream of check valve after test completion.) Ensure that test blinds installed are the Correct thickness. Ensure that all items such as control valves, relief valves,

  • One of the most common uses of nondestructive testing (NDT) is the examination of weld integrity. This is because welds are extraordinarily common in critical industrial applications across the world. The ability to inspect welds nondestructively is essential, as destroying one for testing necessitates replacing it with a new, untested weld. As such, there has been significant technological development

  • We are happy to provide our services for all types of projects including oil and gas EPC projects all over the world for the followings All types of inspections Report making Procedure writing and review online coaching of cources. fitup and weld visual inspections. Report making and reviewing for all activities PWHT witness and checking Hydro-testing checking and report making Final

  • Q: We are expanding our job shop and adding the capability to work with much heavier structures, including considerably thicker materials. Some of these jobs specify high-strength materials and preheating. Some of our welders claim preheating is performed to remove water from the steel. Can you expand on this? A: This is an excellent topic for discussion! Preheating and postweld stress relief are

  • Hydrostatic test Ahydrostatic testis a way in whichpressure vesselssuch aspipelines,plumbing,gas cylinders,boilersand fuel tanks can be tested for strength and leaks. The test involves filling the vessel or pipe system with a liquid, usually water, which may be dyed to aid in visual leak detection, and pressurization of the vessel to the specified

  • We provided services of QA/QC for the project of Al-Taweelah-Alumina refinery for the inspection of piping, preheat, PWHT, NDT, and hydro test inspection. Moreover, we provided RT review facilities as well. As API 510 certified inspector services of mechanical inspection were provided. About the project ofAl-Taweelah alumina refinery. Al-Taweelah alumina refinery is a strategic growth

  • Once you have determined that the welding application requires preheating, consider the best method to use. Induction heating is one preheat option that provides consistent heat throughout the weldment. It offers fast time-to-temperature and is considered a very safe option for preheating. Photo courtesy of Miller Electric Mfg. Co. Preheating with an open flame from a torch is

  • Induction Heating The most common methods for achieving a more controlled preheat temperature are induction heating and electrical resistance heating. “The equipment used for induction is considerably more expensive than that used for electrical resistance heating,” said Fong. “However it does get your steel hotter quicker. It still offers you much more control than what you

  • Art of extracting maximum information from radiography image. This requires subjective judgment of the interpreter Interpretis to give the meaning of to explain.Evaluateis to determine the worth of something.Indicationis a density change appearing on a radiograph.False indicationsare film artifacts, screen Problems, fog, scatter x-ray diffraction.Discontinuityis

  • The major objective of radiographic testing of castings is the disclosure of defects that adversely affect the strength of the product. Castings are a product form that often receive radiographic inspection since many of the defects produced by the casting process are volumetric in nature, and are thus relatively easy to detect with this method. These discontinuities of course, are related to casting

  • Austenitic stainless steels have high ductility, low yield stress and relatively high ultimate tensile strength, when compare to a typical carbon steel. A carbon steel on cooling transforms from Austenite to a mixture of ferrite and cementite. With austenitic stainless steel, the high chrome and nickel content suppress this transformation keeping the material fully austenite on cooling (The Nickel


we provide the following services to all types of industries,

  • Project Procedures writing/review
  • PQR Qualification<br /><b>Notice</b>:  Undefined index: imgalt in <b>/home1/abicaecc/public_html/search.php</b> on line <b>420</b><br />
  • WPS Qualification
  • WPQ welder qualification
  • Material receiving
  • spool release
  • Fit-up inspection
  • Preheat inspection
  • welding inspections
  • NCR issuing and closing
  • NDT witness
  • RT film review
  • PWHT inspection
  • Hydro test package review
  • Hydrotest inspection
  • Reports review
  • Site inspection
  • Walk down of the project
  • Punch list creation 
  • Punch list closing
  • Dossier review
  • Dossier submission
  • Final handover of Project

 


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