Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Products tagged with 'sour service qualification'

View as
Sort by
Display per page
Picture for An Evaluation Of The Ripple Slow Strain Rate (RSSR) Technique For Environmentally Assisted Cracking (EAC) Qualification Of Modified 13Cr-110 Stainless Steel
Available for download

An Evaluation Of The Ripple Slow Strain Rate (RSSR) Technique For Environmentally Assisted Cracking (EAC) Qualification Of Modified 13Cr-110 Stainless Steel

Product Number: 51321-16675-SG
Author: Jing Ning; Yuhchae Yoon; Brent Sherar
Publication Date: 2021
$20.00
Picture for Evaluation Of Girth-Welded 22Cr Duplex Stainless-Steel Piping For Susceptibility To Environmentally Assisted Cracking (EAC), Pitting, And General Corrosion In A Sour Environment
Available for download

Evaluation Of Girth-Welded 22Cr Duplex Stainless-Steel Piping For Susceptibility To Environmentally Assisted Cracking (EAC), Pitting, And General Corrosion In A Sour Environment

Product Number: 51321-16725-SG
Author: Jing Ning; Peter F. Ellis; Ramesh Rao; Brent Sherar
Publication Date: 2021
$20.00
Picture for Sour Service Qualification of Carbon Steels (SMYS 450 MPa) and Their Welds Considering Field H2S Fugacity / Dissolved H2S Concentration - Qualification at Design and Atmospheric Pressure
Available for download

Sour Service Qualification of Carbon Steels (SMYS 450 MPa) and Their Welds Considering Field H2S Fugacity / Dissolved H2S Concentration - Qualification at Design and Atmospheric Pressure

Product Number: 51324-20609-SG
Author: Jiangnan (Hugh) Zhang; Ramesh Rao; Felipe Ramirez; Adam Darwin
Publication Date: 2024
$40.00
A Sulfide Stress Cracking (SSC) qualification program was conducted for carbon steel components (piping, flanges, and fittings with SMYS 450 MPa) and its welds for an offshore facility piping system that may carry off-spec gas in the event of a temporary malfunction of the dehydration and H2S removal units. The off-spec sour gas may contain 22% mol CO2 (pCO2 73 bara) and 6,700 ppm H2S (pH2S 2.22 bara) at a total pressure of 332 bara and temperature of 24 °C with condensed water pH of 3.2. The SSC qualification program included two parts. Part I involved testing at 332 bara using batch-loaded high-pressure autoclaves based on H2S fugacity (fH2S) as permitted by NACE MR175/ISO 15156-2. Part II involved testing at atmospheric pressure by matching the predicted dissolved H2S concentration of the aqueous phase (cH2S) and by matching the predicted fH2S of the gas. Part I and Part II tests were conducted using the same set-up (NACE TM0177 Method A tensile) and stress (75% AYS). Hardness readings taken at the base material (BM), heat affected zone (HAZ) and weld metal (WM) were below 250 HV10 near the root and mid-section of the rings (with couple of single reading exceptions along the HAZ for the rings involving flanges and fittings). Hence, most of the tested carbon steel rings could have been considered suitable for sour service through compliance with NACE MR0175 /ISO 15156-2. Nevertheless, post-examination of test specimens revealed susceptibility to SSC in both Part I and Part II tests. These lab results suggest that NACE MR0175 /ISO 15156-2 guidance on carbon steel SSC resistance, which is based on hardness, is not always conservative.
Categories
Industry
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support