News

Volume XLVI.II:  Pressure Vessel Quality Control Requirements - Part 2

Volume XLVI.II: Pressure Vessel Quality Control Requirements - Part 2

Sep 15, 2022

Materials of construction for the vessel delivered to the manufacturer must be inspected to verify compliance with the Code. For plates, the manufacturer shall verify that the slab number, heat number and material grade marked on the plate match what is shown on the material test report (MTR) provided by the supplier Read more

Volume XLVI.I:  Pressure Vessel Quality Control Requirements - Part 1

Volume XLVI.I: Pressure Vessel Quality Control Requirements - Part 1

Sep 15, 2022

The foundation of the boiler and pressure vessel code lies with ASME. The development of the Code was in response to a boiler explosion at the R.B. Grover Co. in Brockton, Mass. in 1905. In 1907, the State of Massachusetts enacted the first legal code of rules for the construction of steam boilers. The State of Ohio would follow with similar legislation in 1908. In 1915, the ASME released its first draft of the 1914 edition of ASME Rules for Construction of Stationary Boilers and for Allowable Working Pressure. Read more

Volume XLV.II: Piping Design for Potentially Lethal Chemicals Part 2

Volume XLV.II: Piping Design for Potentially Lethal Chemicals Part 2

Sep 15, 2022

The introduction to the ASME-B31.3 piping code states that “The designer is cautioned that the code is not a design handbook…” In stating this, ASME is explaining to the reader in very few words that this code will not provide pointers on the best way to route a piping system, how to support piping, or the amount of slope a pipeline might require. Read more

Volume XLV.I:  Piping Design for Potentially Lethal Chemicals - Part 1

Volume XLV.I: Piping Design for Potentially Lethal Chemicals - Part 1

Sep 15, 2022

In a previous edition of Fabrication News, we discussed the additional requirements for designing and fabricating pressure vessels for lethal service. As you can imagine, the requirement for piping in and out of lethal service pressure vessels would have additional requirements as well. Integrity and reliability are critical for piping and equipment that handle chemicals with extreme health hazards. Read more

Volume XLVIII.II:  Gaskets - How do they work and why do we need them?  Part 2

Volume XLVIII.II: Gaskets - How do they work and why do we need them? Part 2

Sep 12, 2022

A “Soft Gasket” material is a term used when referring to a gasket material that is easily compressed under a low bolt load. This term has been used to distinguish the difference from a metallic gasket. A soft gasket material can be selected from a large variety of elastomers, compressed non-asbestos, PTFE, flexible graphite and high temperature sheet products. Read more

Volume XLVIII.I:  Gaskets - How do they work and why do we need them?  Part 1

Volume XLVIII.I: Gaskets - How do they work and why do we need them? Part 1

Sep 07, 2022

If you are a fabricator, one of the last things on your list is ordering the gaskets. If you are an Engineer, the last thing on your list is specifying gaskets. If you are an owner and you hare having a problem sealing flanges, the number ONE thing on your mind is gaskets. Read more

Volume XLIV:  Acids Handling

Volume XLIV: Acids Handling

Jan 04, 2021

Inorganic acids play a major role in the chemical process industries (CPI). They are used as raw materials, catalysts or finishing and pH control agents in the manufacture of a wide range of chemical products, from fertilizers to detergents, and even foods. Given their widespread use, a major issue in the CPI is the proper and safe handling of the acids, the adequate materials selection for the pieces of equipment, piping and fittings used in the process, and the correct storage and even disposal of these materials. Read more

Volume XLVIII:  Avoid Brittle Fracture

Volume XLVIII: Avoid Brittle Fracture

Nov 19, 2020

During an emergency, equipment failure or a planned maintenance event, hydrocarbon-processing industry (HPI) pressure vessels are normally depressurized. This action may cause auto-refrigeration and low-metal temperature situations in which the likelihood of brittle fracture may occur in steel vessels and reactors. This case history describes the results from a simulation regarding auto-refrigeration effects on HPI reactors. The study also included investigation on brittle-fracture phenomenon and recommendations for a proactive engineering approach to mitigate such failures. Read more

Volume XLVII:  Corrosion under insulation is a hidden problem

Volume XLVII: Corrosion under insulation is a hidden problem

Nov 19, 2020

Corrosion under insulation (CUI) is one of the costliest avoidable problems facing the hydrocarbon processing industry (HPI) today. CUI afflicts refineries— specifically, the steel piping, storage tanks, container vessels and other process equipment within the plants that are subject to extreme temperature fluctuations. Calcium silicate or mineral-wool insulation applied to the pipe or vessel can mitigate the thermal cycling effects. The presence of seams, gaps, or other discontinuities in the insulation layer makes them susceptible to infiltration by outside moisture or the process environment. Read more

Volume XLVI.III:  Design Operations & Maintenance friendly pressure vessels - Part 3

Volume XLVI.III: Design Operations & Maintenance friendly pressure vessels - Part 3

Nov 19, 2020

While part of an operating company’s technical support team, the author was asked for a particular grade of mineral oil. It was discovered that the oil was requisitioned to apply on the inside surface of a vessel before it was put back into operation. Further questioning revealed that the vessel GA drawing included the comment, “Mineral oil, grade xxxx, is to be applied inside the vessel.” The mineral oil coating was meant for new vessels as a rust preventive during transportation and prolonged storage. The technicians had unknowingly been following the procedure for vessel maintenance. Read more

click here to Request a Quote