Products tagged with 'alloy 400'

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Dissimilar Tube-to-Tube Sheet Welding Challenges - A Case Study

Product Number: 51324-21022-SG

Author: Prabhu Bala; Krishnan Sivaraman

Publication Date: 2024

$40.00

A heat exchanger is a device used to transfer heat between two or more fluids and it is an integral part of any oil and gas refinery. Tube-to-tube sheet welding is the most critical activity in fabricating this equipment [1]. There are many factors which needs to be considered to produce a highly reliable weld joint. These factors include the type of the joint, weld joint design, selection of suitable filler wire, and robust inspection plan deployed during fabrication [1]. The task of selecting a suitable filler wire becomes much more challenging when the heat exchanger consists of dissimilar tube to tube sheet weld joints. This paper discusses a case study on the filler metal selection methodology followed for the dissimilar tube-to-tube sheet welding of SB163 UNS N08935 (With 35% of Ni) tube to Alloy 400 clad tube sheet for one of the heat exchangers

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Modelling Electrolytic Hydrofluoric Acid In The Fractionation Phase Change Corrosion Zone Of HF Alkylation Units

Product Number: 51322-17520-SG

Author: Andy C. Gysbers, J. Tim Korstanje, Michael S. Cayard, Peiming Wang, Ezequiel Vincent

Publication Date: 2022

$20.00

Hydrofluoric acid (HF) is used as a catalyst in the alkylation process to react isobutane with olefin feeds to manufacture a high octane alkylate product used in gasoline blending. The HF catalyst is added in its anhydrous liquid form (< 400 ppmw H₂O) but as it circulates in the reaction system, residual water in the Paper No. 17520 liquid hydrocarbon feed is absorbed by the acid such that the circulating reaction acid builds up a small percentage (0.5 to 2.0 mass%) of water. This water/HF mixture is also referred to as rich HF (RHF). In addition, the alkylation reactions also will generate fluorocarbons and acid soluble oils (ASOs).

Products tagged with 'alloy 400'

Dissimilar Tube-to-Tube Sheet Welding Challenges - A Case Study

Modelling Electrolytic Hydrofluoric Acid In The Fractionation Phase Change Corrosion Zone Of HF Alkylation Units

Association for Materials Protection and Performance