High Pressure Tubing Material Performance Review

2017 ◽  
Author(s):  
Kraig D. Warren
Keyword(s):  
High Pressure ◽  
High Strength ◽  
Medium Carbon ◽  
Performance Review ◽  
Fine Grain ◽  
Industry Standards ◽  
Pressure Tubing ◽  
Section Viii ◽  
Non Destructive ◽  
Tubing Material

The purpose of the study was to find an alternative supply of material for high pressure tubing used in the manufacture of plastic in Low Density Polyethylene (LDPE) plants. The material selected by A&A Machine & Fabrication, LLC was HS220-27Ca4, which is manufactured by TimkenSteel. The HS220-27Ca4 material is a fine-grain, forged rolled alloy with optimal chemistry of medium carbon and a balance of chromium, nickel and molybdenum to achieve ultra-high strength and toughness. The material was laboratory tested to fatigue standards defined by ASME Section VIII Division 3 Article KD-3. In addition, the material was processed by A&A Machine & Fabrication, LLC to autofrettage requirements set forth in ASME Section VIII Division 3 Article KD-5. To satisfy industry standards and customer specifications, dimensional and non-destructive test data was gathered throughout the fabrication process. This information and comparative chemistry data is presented and reviewed as a means to demonstrate acceptance of HS220-27Ca4 for use in LDPE process.

Development of Design Criteria for a High Pressure Vessel Construction Code

1987 ◽  
Vol 109 (2) ◽  
pp. 256-259 ◽  
Author(s):  
G. J. Mraz
Keyword(s):  
High Pressure ◽  
Pressure Vessel ◽  
High Strength Steels ◽  
High Strength ◽  
Design Criteria ◽  
Construction Methods ◽  
Shrink Fitting ◽  
Section Viii ◽  
Pressure Stress ◽  
Selection Of

Out of concern for public safety, most legal jurisdictions now require unfired pressure vessel construction to comply with the ASME Boiler and Pressure Vessel Code. Because the present two divisions of Section VIII of that Code are not well suited for high pressure design, a new division is needed [1]. The currently anticipated main design criteria of the proposed division are full plastic flow or full overstrain pressure, stress intensity in the bore, fatigue, and fracture mechanics. The rules are expected to allow better utilization of high strength steels already included in the present Section VIII. At the same time materials of even higher strength are introduced. The benefits of compressive prestress are recognized. Construction methods allowing it’s achievement, such as autofrettage, shrink fitting and wire winding are included. Reasons for selection of the criteria are given.

Fatigue Life of Commercial High Pressure Tubing

2002 ◽  
Author(s):  
Michael D. Mann
Keyword(s):  
High Pressure ◽  
Fatigue Life ◽  
Pressure Vessel ◽  
Pressure Vessels ◽  
Thick Wall ◽  
Pressure Tubing ◽  
Safety And Reliability ◽  
Section Viii ◽  
Critical Components ◽  
Axial Fatigue

Design guidance for high pressure components, has undergone a dramatic change with the release of ASME Section VIII division 3 pressure vessel code. For the first time, a thorough design criteria is available for design of thick wall pressure vessels. The most critical components of a design are safety and reliability. Ultra high-pressure vessels, in most cases, do not have an “infinite” life. The design must therefore be “leak before break” and a design cycle life must be specified. This paper looks at the effects of fatigue on commercial high-pressure tubing under tri-axial fatigue. The tubing investigated is 316 stainless steel 9/16″ and 3/8″ diameter 4100 bar (60,000 psi) tubing. The testing was performed using a tri-axial fatigue machine originally designed by Dr. B. Crossland, Dr. J. L. M. Morrison and Dr. J. S. C. Perry in 1960 and upgraded by the Author. This investigation compares the fatigue life prediction per KD3 in the ASME pressure vessel code Section VIII division 3 and actual test results from the fatigue machine. This verification gives important reliability data for commercial hardware used in high-pressure piping.

Weldability of High-Strength Stainless Steel for High Pressure Gaseous Hydrogen Environments

2017 ◽  
Vol 86 (8) ◽  
pp. 555-558
Author(s):  
Kana JOTOKU ◽  
Jun NAKAMURA ◽  
Takahiro OSUKI ◽  
Hiroyuki HIRATA
Keyword(s):  
High Pressure ◽  
Stainless Steel ◽  
High Strength ◽  
Gaseous Hydrogen

Corrosion Metal Loss Interaction From In-Line Inspection and How it Can Affect the Calculated Failure Pressure

2012 ◽  
Author(s):  
Lucinda Smart ◽  
Richard McNealy ◽  
Harvey Haines
Keyword(s):  
Field Measurements ◽  
Metal Loss ◽  
Data Correlation ◽  
Failure Pressure ◽  
Industry Standards ◽  
Direct Measurements ◽  
Non Destructive ◽  
Flux Leakage

In-Line Inspection (ILI) is used to prioritize metal loss conditions based on predicted failure pressure in accordance with methods prescribed in industry standards such as ASME B31G-2009. Corrosion may occur in multiple areas of metal loss that interact and may result in a lower failure pressure than if flaws were analyzed separately. The B31G standard recommends a flaw interaction criterion for ILI metal loss predictions within a longitudinal and circumferential spacing of 3 times wall thickness, but cautions that methods employed for clustering of ILI anomalies should be validated with results from direct measurements in the ditch. Recent advances in non-destructive examination (NDE) and data correlation software have enabled reliable comparisons of ILI burst pressure predictions with the results from in-ditch examination. Data correlation using pattern matching algorithms allows the consideration of detection and reporting thresholds for both ILI and field measurements, and determination of error in the calculated failure pressure prediction attributable to the flaw interaction criterion. This paper presents a case study of magnetic flux leakage ILI failure pressure predictions compared with field results obtained during excavations. The effect of interaction criterion on calculated failure pressure and the probability of an ILI measurement underestimating failure pressure have been studied. We concluded a reason failure pressure specifications do not exist for ILI measurements is because of the variety of possible interaction criteria and data thresholds that can be employed, and demonstrate herein a method for their validation.

Design of a novel HSLA steel with a combination of high strength (140–160 ksi) and excellent toughness

2021 ◽  
Vol 112 (10) ◽  
pp. 800-811
Author(s):  
Mehdi Soltan Ali Nezhad ◽  
Sadegh Ghazvinian ◽  
Mahmoud Amirsalehi ◽  
Amir Momeni
Keyword(s):  
Impact Toughness ◽  
Yield Strength ◽  
Hsla Steel ◽  
Charpy Impact ◽  
High Strength ◽  
Controlled Rolling ◽  
The Other ◽  
Grain Structure ◽  
Charpy Impact Toughness ◽  
Fine Grain

Abstract Three steels were designed based on HSLA-100 with additional levels of Mn, Ni, Cr and Cu. The steels were prepared by controlled rolling and tempered at temperatures in range of 550–700°C. The continuous cooling time curves were shifted to longer times and lower temperatures with the increased tendency for the formation of martensite at lower cooling rates. The microstructures revealed that controlled rolling results in austenite with uniform fine grain structure. The steel with the highest amount of Mn showed the greatest strength after tempering at 750 °C. The top strength was attributed to the formation of Cu-rich particles. The steel with 1.03 wt.% Mn, tempered at 650 °C exhibited the best Charpy impact toughness at –85°C. On the other hand, the steel that contained 2.11 wt.% Mn and tempered at 700 °C showed the highest yield strength of 1 097.5 MPa (∼159 ksi) and an impact toughness of 41.6 J at –85°C.

Achieving Ultra-High Strength of Al-Cu-Li Alloys by the Combination of High Pressure Torsion and Age-Hardening

2021 ◽  
Author(s):  
Jiahui Dong ◽  
Nong Gao ◽  
Ying Chen ◽  
Lingfei Cao ◽  
Hui Song ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
High Strength ◽  
Age Hardening
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