Menu
Search
Filters
Close
Menu

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

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
Product Number: 51321-16725-SG
Author: Jing Ning; Peter F. Ellis; Ramesh Rao; Brent Sherar
Publication Date: 2021
$0.00
$20.00
$20.00

The results of a stress corrosion cracking (SCC) qualification study of twenty-four heats of girth-welded 22Cr duplex stainless steel (DSS) piping are reported. This study evaluated the performance of either triplicate welded ANSI/NACE TM0177-2016 Method A tensile specimens or triplicate welded NACE TM0316-2016-compliant four-point-bend-beam (FPBB) specimens per heat exposed to a sour environment at 90 °C. All environmentally assisted cracking (EAC) specimens were stressed to an equivalent of 90% of their respective 0.2%-offset yield strengths at 90 °C to assess SCC susceptibility. In addition, duplicate welded corrosion coupons were machined per heat for determination of pitting susceptibility and weight loss corrosion rates. All EAC specimens and corrosion coupons were machined in the longitudinal direction with the weld metal transecting the specimens at mid-length so that each specimen contained a portion of parent metal, the heat-affected zone (HAZ) and weld metal.
Tensile specimens were installed in proprietary Window-Box Sustained-Load (WBSL) fixtures and loaded to 90% of the actual uniaxial 0.2% offset yield strength at 90°C (AYS90°C), of the heat-specific parent material per ANSI/NACE MR0175/ISO 15156-3:2015. Alternately, FPBB specimens were assembled in four-point bending fixtures and deflected at room temperature to the strain corresponding to 90% AYS90°C of the heat-specific parent material. The stressed EAC specimens and corrosion coupons were exposed to a simulated sour service environment containing up to 0.18 bar H2S and 33,000 mg/L Cl at 90 °C for 720 hours. All EAC specimens passed and weight-loss corrosion rates were < 0.036 mpy.
In addition, Annex A.7.3, ANSI/NACE MR0175/ISO 15156-3:2015 specifies hardness requirements.
Hardness surveys of a girth-weld sample per heat were performed using Vickers hardness tester in
accordance with this Standard for butt welds. Hardness survey of each heat demonstrated that hardness
of base metal, HAZs and weld did not exceed the maximum hardness specified in the Standard.

The results of a stress corrosion cracking (SCC) qualification study of twenty-four heats of girth-welded 22Cr duplex stainless steel (DSS) piping are reported. This study evaluated the performance of either triplicate welded ANSI/NACE TM0177-2016 Method A tensile specimens or triplicate welded NACE TM0316-2016-compliant four-point-bend-beam (FPBB) specimens per heat exposed to a sour environment at 90 °C. All environmentally assisted cracking (EAC) specimens were stressed to an equivalent of 90% of their respective 0.2%-offset yield strengths at 90 °C to assess SCC susceptibility. In addition, duplicate welded corrosion coupons were machined per heat for determination of pitting susceptibility and weight loss corrosion rates. All EAC specimens and corrosion coupons were machined in the longitudinal direction with the weld metal transecting the specimens at mid-length so that each specimen contained a portion of parent metal, the heat-affected zone (HAZ) and weld metal.
Tensile specimens were installed in proprietary Window-Box Sustained-Load (WBSL) fixtures and loaded to 90% of the actual uniaxial 0.2% offset yield strength at 90°C (AYS90°C), of the heat-specific parent material per ANSI/NACE MR0175/ISO 15156-3:2015. Alternately, FPBB specimens were assembled in four-point bending fixtures and deflected at room temperature to the strain corresponding to 90% AYS90°C of the heat-specific parent material. The stressed EAC specimens and corrosion coupons were exposed to a simulated sour service environment containing up to 0.18 bar H2S and 33,000 mg/L Cl at 90 °C for 720 hours. All EAC specimens passed and weight-loss corrosion rates were < 0.036 mpy.
In addition, Annex A.7.3, ANSI/NACE MR0175/ISO 15156-3:2015 specifies hardness requirements.
Hardness surveys of a girth-weld sample per heat were performed using Vickers hardness tester in
accordance with this Standard for butt welds. Hardness survey of each heat demonstrated that hardness
of base metal, HAZs and weld did not exceed the maximum hardness specified in the Standard.

Product tags
Also Purchased
Picture for A Review Of Chloride Stress Corrosion Cracking Factors For Austenitic Stainless Steel
Available for download

A Review Of Chloride Stress Corrosion Cracking Factors For Austenitic Stainless Steel

Product Number: 51322-17524-SG
Author: Sangeetha Rao
Publication Date: 2022
$20.00

This paper will identify and document how these different factors affect the susceptibility of austenitic stainless steel to Chloride-Stress Corrosion cracking based on a review of currently available literature. A review of current industry best practices and a review of how the Oxygen content, the pH and application of stress relief affects Chloride-Stress Corrosion Cracking will be documented and presented.
Picture for Corrosion Resistance Evaluation Of Super Duplex Stainless Steel In Supercritical CO2 Saturated Liquid Phase Containing Impurities O2 Or SO2
Available for download

Corrosion Resistance Evaluation Of Super Duplex Stainless Steel In Supercritical CO2 Saturated Liquid Phase Containing Impurities O2 Or SO2

Product Number: 51322-17602-SG
Author: Daisuke Matsuo, Masayuki Sagara, Yuji Arai, Hisashi Amaya, Kyohei Kanki
Publication Date: 2022
$20.00

Carbon capture, utilization and storage (CCUS) is one of the key technologies to achieve the net-zero emission. One of the CCUS method is CO2 injection to depleted oil and gas wells or aquifers and storage (CCS). The CO2 emitted from fossil fuel-based powers and industrial plants are captured and transported to the injection point by ships or pipe line. Following that, the dense phase or supercritical phase CO2 will be injected to depleted oil and gas wells or aquifers through oil country tubular goods, for examples, seamless pipe.
Picture for Influence Of Thermomechanical Processing On Mechanical Properties And Corrosion Resistance Of Super Duplex Stainless Steel UNS S32750.
Available for download

Influence Of Thermomechanical Processing On Mechanical Properties And Corrosion Resistance Of Super Duplex Stainless Steel UNS S32750.

Product Number: 51322-17613-SG
Author: Clara Herrera, Merlin Seifert
Publication Date: 2022
$20.00

Duplex stainless steels (DSSs) are based on the Fe-Cr-Ni system and are constituted of 30 to 70 % ferrite and austenite. They combine high tensile strength, good toughness, weldability, and excellent corrosion resistance including stress-corrosion cracking and resistance to localized corrosion.1-3 DSSs can be classified according to the Pitting Resistance Equivalent Number (PREN = Cr + 3.3 Mo + 16 N) in lean duplex (PREN= 22-27), standard (PREN = 28-38), super duplex (PREN = 38-45) and hyperduplex (PREN > 45).
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

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