+44(0)1268 888500 info@lff.co.uk Downloads Home About Us Products Projects Services & MRO Blog Contact Blog BLOG Flanges - Maximum Allowable Working Pressure 15 April 2020 by Rupert Wickens 1. IntroductionThe maximum allowable working pressure (MAWP) is the maximum pressure at which a flange may be operated at given temperature and is normally expressed in terms of the flange rating. In the case of ASME B16.5 flanges, as the... Read More Introduction to Alloy 625 - Part 3 6 December 2019 by Rupert Wickens 1. INTRODUCTIONThis is Part 3 of a series of articles covering the invention and development of Alloy 625. In Part 2, I covered the solidification behaviour of Alloy 625 and how this affects the melting practices. I discussed the metallurgy of... Read More Introduction to Alloy 625 - Part 2 5 June 2019 by Rupert Wickens, LFF Group Engineering Manager 1. INTRODUCTIONThis is Part 2 of a series of articles covering the invention and development of Alloy 625. In Part 1, I discussed how the alloy was developed based on the effects of the different alloying elements on strength and creep... Read More Introduction to Alloy 625 - Part 1 31 May 2018 by Rupert Wickens, LFF Group Engineering Manager 1. INTRODUCTIONAlloy 625 (UNS N06625) is a nickel based alloy. It is used extensively in the oil and gas and petrochemical industries when a material with high strength and good corrosion resistance is required, but process conditions preclude the use of... Read More Fundamentals of Carbon Steel Part 3 - Microstructures 27 October 2017 by Rupert Wickens, LFF Group Engineering Manager In my earlier articles on the fundamentals of carbon steel I discussed the effect of time on the transformation process and the microstructures that result from the decomposition of austenite depending on the cooling rate. I introduced the concept of... Read More Fundamentals of Carbon Steel Part 2 - Heat Treatment 24 July 2017 by Rupert Wickens, LFF Group Engineering Manager In my article “Fundamentals of Carbon Steel Part 1” I introduced the concept of the iron-carbon phase-diagram (Figure 1) and explained how it shows the phases that will be present at ambient temperature when steel is cooled slowly from a... Read More Fundamentals of Carbon Steel Part 1 - Phases & Microstructures 3 May 2017 by Rupert Wickens, LFF Group Engineering Manager Carbon steel is fundamentally an alloy of iron and carbon. At room temperature, carbon is virtually insoluble in iron; the maximum solubility of carbon is approximately 0.008 wt%. Below 0.008 wt%, the structure will be made up entirely of ferrite,... Read More Introduction to 22% Chrome Duplex Stainless Steel 22 March 2017 by Rupert Wickens, LFF Group Engineering Manager 22%Cr duplex stainless steel (UNS S31803, UNS 32205) is a dual phase alloy containing approximately equal amounts of ferrite and austenite, as indicated in Figure 1. Compared with Type 316/316L stainless steel, it has slightly improved resistance to general/pitting corrosion,... Read More Offshore pipe size selection 31 January 2017 by Rupert Wickens, LFF Group Engineering Manager The principal factors governing the pipe size to be used are the nature of the fluid, the flow velocity and pressure drop. The sizing criteria are different depending on whether the pipe is carrying a single-phase liquid, a single-phase gas... Read More Introduction to corrosion 2 December 2016 by Rupert Wickens, LFF Group Engineering Manager Corrosion is a naturally occurring phenomenon and is defined as the deterioration of a material (usually a metal) as a result of a chemical or electro-chemical reaction between it and its immediate environment. Both the type of material and the... Read More 1 2 Latest Posts Flanges - Maximum Allowable Working Pressure 15 April 2020 Introduction to Alloy 625 - Part 3 6 December 2019 Introduction to Alloy 625 - Part 2 5 June 2019 Introduction to Alloy 625 - Part 1 31 May 2018 More LFF Group has always been agile in responding to change and developments in the global oil and gas industry and although our roots remain firmly in London, we now have offices in 12 locations across the globe, which enables us to respond quickly to specific regional requirements. Learn More SUPPORT ABOUT Latest From Blog Flanges - Maximum Allowable Working Pressure 15 April 2020 Introduction to Alloy 625 - Part 3 6 December 2019 Introduction to Alloy 625 - Part 2 5 June 2019 Introduction to Alloy 625 - Part 1 31 May 2018 More Projects Petrochemical LNG/GTL Desalination Oil & Gas Subsea MRO More Find Us LFF Group Christy Way, Southfields Industrial Park, Basildon, Essex SS15 6TE England +44(0)1268 888500 info@lff.co.uk Copyright © 2018 LFF Group. All Rights Reserved