Elevated Temperature Autofrettage

1967 ◽  
Vol 89 (3) ◽  
pp. 369-375 ◽  
Author(s):  
I. Berman ◽  
D. H. Pai
Keyword(s):  
High Pressure ◽  
Elevated Temperature ◽  
Stress Intensity ◽  
Intensity Distribution ◽  
Design Pressure ◽  
Autofrettage Pressure

Two new processes of cylinder autofrettage (prestress) have been analyzed and compared to the standard high pressure autofrettage. By means of a highly improved stress intensity distribution at design pressure, it was shown that a significant increase in allowable pressure and a reduction of autofrettage pressure may be achieved by the new processes.

High-Pressure Gelatinization of Barley Starch at Low Moisture Levels and Elevated Temperature

1993 ◽  
Vol 45 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Jukka Vainionpää ◽  
Pirkko Forssell ◽  
Teija Virtanen
Keyword(s):  
High Pressure ◽  
Elevated Temperature

Sufficiency of Reference Stress Solutions for FFS Evaluation of Crack-Like Flaws

2017 ◽  
Author(s):  
Kenji Oyamada ◽  
Naoki Miura
Keyword(s):  
High Pressure ◽  
Elevated Temperature ◽  
Comparative Study ◽  
Assessment Procedure ◽  
Bending Stress ◽  
Draft Guideline ◽  
Membrane Stress ◽  
Reference Stress ◽  
Standard Development

In Japan, a new standard of an assessment procedure for crack-like flaws in pressure equipment at elevated temperature is now under development in the High Pressure Institute of Japan (HPI). In this standard development, it is needed to adopt reference stress solutions for crack-like flaws in pressure equipment being subjected to membrane stress and/or bending stress. Such reference stress solutions have been proposed in various references such as ASME FFS-1/API579-1, BS7910, R5, FBR draft guideline, HPIS Z101-2, etc. A comparative study of those reference stress solutions was conducted in order to select appropriate one. As a result, reference stress solutions in HPIS Z101-2 were adopted. The sufficiency of adopted reference stress solutions was introduced in this paper. Also, the reference stress solutions for axially and circumferentially through-wall rectangular flawed cylinders, which were not provided in the HPIS Z101-2 standard but were utilized to derive those solutions adopted in the standard, were introduced in this paper. These solutions should be adopted in a new HPI standard for crack-like flaws in pressure equipment at elevated temperature.

Strength Evaluation for Pressure-Containing Parts of Ultra-High-Pressure Compressor by Using Standards of Ultra-High-Pressure Gas Equipment

2011 ◽  
Author(s):  
Yohei Tanno ◽  
Tomohiro Naruse ◽  
Shigeru Arai ◽  
Shinichiro Kurita
Keyword(s):  
High Pressure ◽  
Fatigue Strength ◽  
Absorbed Energy ◽  
Ultra High Pressure ◽  
High Pressure Compressor ◽  
Asme Code ◽  
American Standard ◽  
Leak Before Break ◽  
Design Pressure ◽  
Pressure Compressor

The Japanese standard “KHK-S-0220” (KHK-code) and the American standard “Boiler and Pressure Vessel Code Sec.8 Div.3” (ASME-code) concerning ultra-high-pressure gas equipment were applied to Hitachi’s ultra-high-pressure compressor, and a series of strength evaluations were carried out. Hitachi produces and maintains ultra-high-pressure reciprocating compressors with a design pressure over 200 MPa. In Japan, ultra-high pressure gas equipment over 100 MPa must be designed according to KHK-code established by the High Pressure Gas Safety Institute of Japan. This Japanese standard was applied to an ultra-high-pressure compressor, and design pressure limits, shakedown limits, required absorbed energy of materials, leak-before-break (LBB), and fatigue strength were evaluated. ASME-code was also applied to the compressor, and strength evaluations like the above were carried out. As a result, it was found that KHK-code and ASME-code gave conservative evaluation of fatigue strength for an ultra-high-pressure compressor.

Limit State Design Based on Experimental Methods for High Pressure Subsea Pipeline Design

2010 ◽  
Author(s):  
Chris Alexander
Keyword(s):  
High Pressure ◽  
Limit State ◽  
Experimental Methods ◽  
Economic Benefits ◽  
Thick Wall ◽  
Pipeline System ◽  
Potential Cost ◽  
Limit State Design ◽  
Pipeline Design ◽  
Design Pressure

The design of offshore subsea pipelines is facing new challenges as the pipeline industry is moving into environments requiring high pressure design. Conventional pipeline design codes such as ASME B31.4 and B31.8 establish pressure limits based on percentage of the pipe material’s minimum specified yield strength. While this has traditionally worked for relatively thin-walled pipe at moderate pressures, there are concerns that full utilization of the material’s capacity is not being realized when designing for high pressure conditions. Additionally, there are concerns regarding the ability to achieve high quality manufacturing and consistently fabricate welds in thick-wall pipes. This paper presents details on a testing program that incorporated full-scale burst testing to qualify the design pressure for an 18-inch × 0.75-inch, Grade X65 subsea gas pipeline using the methodology of API RP 1111. A lower bound burst pressure was established based on the recorded burst pressures to which a design margin of 0.72 was applied to determine a design pressure. Had the pipeline been conventionally-designed using ASME B31.8, the design pressure would have been 3,900 psi. However, using the experimentally-based design option in API RP 1111 the resulting design pressure was 4,448 psi. This results in a net increase in the design pressure of 14 percent. When one considers either the potential cost savings in material requirements at construction or the additional throughput associated with higher design pressures for a given pipeline system, it is not difficult to demonstrate the economic benefits derived in performing a more rigorous material qualification and limit state design process based on experimental methods as presented in API RP 1111.

Technical Progress in Chinese Standard of Ultra-High Pressure Vessels

2019 ◽  
Author(s):  
Zhiwei Chen ◽  
Tao Li ◽  
Guoyi Yang ◽  
Jinyang Zheng ◽  
Guide Deng
Keyword(s):  
High Pressure ◽  
Nondestructive Testing ◽  
Technical Progress ◽  
Pressure Vessel ◽  
Pressure Vessels ◽  
National Standard ◽  
High Pressure Vessel ◽  
Ultra High Pressure ◽  
Chinese Standard ◽  
Design Pressure

Abstract GB/T 34019-2017 “Ultra High Pressure Vessels” is the most important national standard that applies to pressure vessel which design pressure value is greater than or equal to 100MPa (14.5ksi). There is no standard for Ultra-high Pressure Vessel, Then this standard fills the gap in the standard system of pressure equipment in China. This paper mainly introduces the concept and main content of the new national standard, including the materials, design methods and nondestructive testing of ultra-high pressure vessel.

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