ISO 17025 accredited vs compliant
Compliant or ISO 17025 accredited: Is there a difference? Recently I was having a conversation regarding quality and the often-used phrase came up- ” All things being equal”. This got me thinking when are all things equal? In this particular conversation, it was regarding compliant versus accredited. I don’t think it is immoral, illegal or unethical to use the term compliant when advertising a companies qualifications. That said, there is a significant difference between being compliant and being accredited. Often the term compliant is used when a company offering goods or services is not accredited to the particular standard referenced to … Continue reading ISO 17025 accredited vs compliant
The project requires Killed Steel treatment on Pipe, Plate MTC.
Fully killed is the term to describe de-oxidized steel. After the steel is made, it is then poured into the continuous caster to make a long slab of steel. Think of a sausage maker – molten steel goes in at the top and rectangular slab comes out the bottom. This is called casting. During casting, small carbon monoxide bubbles can form between the steel grains if the oxygen is not removed. If you’ve ever painted a door and seen bubbles in the paint once you apply it you’ll recognize the similarities. To stop these bubbles appearing you paint slower, but … Continue reading The project requires Killed Steel treatment on Pipe, Plate MTC.
API 510 Addendum 2 (2018)
Date of Issue: March 2018 Affected Publication: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014 Addendum 2 Page v (Table of Contents): Changed title in the entry for Section 6.7 to the following: Page 6: Added “deferral” term and definition: 3.1.16 deferral An approved and documented postponement of an inspection, test, or examination. See 6.7. Page 6: Added “due date” term and definition: 3.1.19 due date The date established by the owner-user and in accordance with this code, whereby an inspection, test, examination, or inspection recommendation falls due or is to be … Continue reading API 510 Addendum 2 (2018)
API 510 Addendum 1 (2017)
Date of Issue: May 2017 Affected Publication: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014 Addendum 1 Page 26, Section 5.5.6.1, shall read: Inspection for CUI shall be considered for externally insulated vessels and those that are in intermittent service or operate at temperatures between: a) 10 °F (–12 °C) and 350 °F (177 °C) for carbon and low alloy steels, b) 140 °F (60 °C) and 350 °F (177 °C) for austenitic stainless steels, c) 280 °F (138 °C) and 350 °F (177 °C) for duplex stainless steels. Page 60, Section … Continue reading API 510 Addendum 1 (2017)
Stainless steel 347H and PWHT
”In the welded condition many stainless steels are susceptible to rapid intergranular corrosion or stress corrosion cracking. This is because the heat from welding sensitizes the base metal heat affected zone (HAZ) and the weld. Sensitization is the condition where chromium carbide precipitation at the grain boundaries (from a heating process, e.g., welding, hot forming, hot bending, service temperature, etc.) reduces the amount of chromium in solution in the stainless steel. The temperature range for sensitization to occur for austenitic stainless steels is approximately 700 °F to 1500 °F. Since the carbides precipitate in the HAZ or weld deposit at … Continue reading Stainless steel 347H and PWHT
Hardness requirement in Sour service for (Duplex) Stainless steel
Section 7, Table 7-11 of DNV Standard OS-F101 October 2010 – Submarine pipeline systems – provides HV10 limits for weldments in 22Cr and 25Cr duplex stainless steels for line pipes. For 22Cr and 25Cr duplex, the hardness in the weld and HAZ shall not exceed 350HV10 and the base material shall not exceed 290HV10 for 22Cr, and 330HV10 for 25Cr. Section 6, paragraph B201 of DNV Standard OS-F101 October 2010 states that materials shall be selected for compliance with ISO 15156. NORSOK Standard M-630 Rev.4 January 2004 – Material data sheets for piping – included material requirements in the form … Continue reading Hardness requirement in Sour service for (Duplex) Stainless steel
What is Engineering Critical Assessment (ECA)?
What is an ECA? Most welding fabrication codes specify maximum tolerable flaw sizes and minimum tolerable Charpy energy, based on good workmanship, i.e. what can reasonably be expected within normal working practices. These requirements tend to be somewhat arbitrary, and failure to achieve them does not necessarily mean that the structure is at risk of failure. An Engineering Critical Assessment (ECA) is an analysis, based on fracture mechanics principles, of whether or not a given flaw is safe from brittle fracture, fatigue, creep or plastic collapse under specified loading conditions. An ECA can, therefore, be used: During design, to assist … Continue reading What is Engineering Critical Assessment (ECA)?
Change electrode manufacture, vendor in welding WPS.
If welding is to be performed according to a welding procedure specification, it is possible that changing the electrode manufacturer will invalidate the approval of the procedure to the code/standard on which it was based. The manufacturer or ‘trade name’ of the electrode can be classed as an essential variable in a given weld procedure. The extent to which re-qualification is necessary will vary from code to code. For example, in EN ISO 15614-1[1] and in the UK standard BS 4515:2004[2], approval is only restricted to the specific make of electrode if impact testing is required as part of the procedure qualification. On the … Continue reading Change electrode manufacture, vendor in welding WPS.
Portable hardness test tools
There are several portable hardness testers available, with some more appropriate to certain situations than others. The particular hardness tester for the job would depend on what you needed to find out and why. For example, a Barcol hardness tester for use on Al alloys is generally used as a comparative tool; to indicate a loss in strength in damaged regions of a structure compared with undamaged regions or virgin material. Barcol hardness testers are very portable and are good for this type of comparative work, but the conversion to more widely recognized hardness scales is only approximate. Telebrineller testers. … Continue reading Portable hardness test tools
AMARINE 