AMPP Store - Products tagged with 'pwht'

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51318-10588-Corrosion Resistance of Roll-Bonded Clad Plates for Oil & Gas Applications

Product Number: 51318-10588-SG

Author: Sandra Le Manchet / Bastien Chareyre / Cédric Chauvy / Sarata Cissé

Publication Date: 2018

$20.00

This paper will be dedicated to the corrosion resistance of roll-bonded UNS N06625 and N08825 clad materials.

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Development and Implementation of a Novel Method to Remove Inorganic Zinc Coating from Low Alloy Steel

Product Number: 41215-913-SG

Author: Barry Messer, Yasir Idlibi, Sergio Vitomir

Publication Date: 2015

$20.00

Inorganic zinc (IOZ) silicate coating was previously applied to partially fabricated low alloy, 21/4 Cr-1MoV, high temperature, hydrogen, reactor vessels for long-term storage corrosion protection prior to final welding and post weld heat treatment (PWHT) at 690-720°C (1274-1328°F). The need for complete coating removal to mitigate the known embrittlement and weld cracking that can occur after welding and PWHT led to the development of a novel, environmentally friendly method to remove IOZ to trace levels below 1 ppm.

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NACE SP0403-2023, Avoiding Caustic Stress Corrosion Cracking of Refinery Equipment and Piping

Product Number: NACE SP0403-2023

Publication Date: 2023

$109.00

This standard practice is intended to provide guidance to those designing, fabricating, and/or maintaining refinery equipment and piping that are exposed to caustic environments.

Caustic is used in many petroleum refinery applications in a wide range of concentrations and temperatures. Caustic stress corrosion cracking (SCC) of carbon steel (CS) equipment has been reported in industry since the 1930s, e.g., in riveted steam boilers. NACE has published guidance for handling sodium hydroxide (NaOH) in the form of a “Caustic Service Chart” since at least the mid-1960s.

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Role of Non-Metallic Inclusions and the Microstructure Constituents on HIC Performance

Product Number: MPWT19-14439

Author: Amro Al-Hattab1,Diaa Elsanosy2, Gaurav Tomer3, Abdullah Al-Jarbou4

Publication Date: 2019

$0.00

With increasing oil & gas demand and depletion of sweet reserves, oil & gas companies in the regional
economies are focusing towards the exploitation of sour resources. This necessitates the use of pipelines
and down-hole tubing made from special steels with significant resistance to hydrogen-induced cracking
(HIC). These steels are produced through specific technologies for enhanced chemical composition control
and microstructural engineering to incorporate the required strength, weld ability and improved HIC
resistance. It is well established that the HIC initiates at sites with microstructural heterogeneities whether
due to presence of gross nonmetallic inclusions or the micro-structural constituents. The presence of central
segregation further aggravates the conditions particularly when the final pipe sizes require the longitudinal
slitting of the coils. Presence of non-metallic inclusions in the steel makes it vulnerable to hydrogen-induced
cracking under wet H2S environment. The mechanism of HIC begins with the generation of hydrogen atoms
by corrosion reaction of H2S and Fe in the presence of free water. The hydrogen atoms then diffuse into
steel and accumulate around the inclusions. The higher number of inclusions equates to the more sites
available for hydrogen adsorption. Recombination of hydrogen atoms to H2 molecules builds up a heavy
gas pressure in the interface between matrix and inclusions. Cracking initiates because of the tensile stress
field caused by hydrogen gas pressure and crack propagates in the surrounding steel matrix. The
longitudinal slitting exposes the internal microstructural abnormalities to the skelp edges which are then
incorporated in the thermally stressed weld zone. While the post-weld heat treatment (PWHT) mostly
homogenizes the weld zone microstructure, the presence of excessive central line features cannot be
completely removed thereby making this zone more prone to HIC attack

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The Sensitisation Behaviour of Alloy UNS N08825 After Heat Treatment as Used in Clad Materials

Product Number: 51317--9459-SG

ISBN: 9459 2017 CP

Author: Helena Alves

Publication Date: 2017

$20.00

The aim of this paper is to present recent standard test corrosion data obtained in laboratory for alloy UNS N08825 after post weld heat treatment in comparison with as delivered (soft annealed) material.

Products tagged with 'pwht'

51318-10588-Corrosion Resistance of Roll-Bonded Clad Plates for Oil &amp; Gas Applications

Development and Implementation of a Novel Method to Remove Inorganic Zinc Coating from Low Alloy Steel

NACE SP0403-2023, Avoiding Caustic Stress Corrosion Cracking of Refinery Equipment and Piping

Role of Non-Metallic Inclusions and the Microstructure Constituents on HIC Performance

The Sensitisation Behaviour of Alloy UNS N08825 After Heat Treatment as Used in Clad Materials

Association for Materials Protection and Performance

51318-10588-Corrosion Resistance of Roll-Bonded Clad Plates for Oil & Gas Applications