Evaluation of Sealing Behavior of Gaskets Based on the Test Method HPIS Z104 Proposed in Japan

2006 ◽  
Author(s):  
Takashi Kobayashi ◽  
Toshiyuki Sawa ◽  
Hirokazu Tsuji ◽  
Shoichi Shigetome
Keyword(s):  
Internal Pressure ◽  
Testing Procedure ◽  
Test Method ◽  
Reasonable Time ◽  
Fiber Sheet

This paper discusses the gasket testing procedure HPIS Z104 to obtain fundamental sealing behavior of gasket established in Japan. The testing procedure consists of 11 combinations of gasket stresses and a constant internal pressure. It takes about 3 hours to complete one test, which is acceptable for gasket manufacturers. In order to demonstrate the validity of the testing procedure, measurements of leak rates of compressed fiber sheet gaskets were carried out. It has shown that the fundamental sealing behavior can be well characterized using the proposed testing procedure with reasonable time and cost.

Characterization of Sealing Behavior of Gaskets for the Leak Rate Based Design of Gasketed Bolted Flanged Connections

2008 ◽  
Author(s):  
Takashi Kobayashi
Keyword(s):  
Internal Pressure ◽  
Testing Procedure ◽  
Test Method ◽  
Leak Rate ◽  
Test Results ◽  
Japanese Industrial Standard ◽  
Sealing Performance ◽  
Stress Levels ◽  
Spiral Wound

This paper discusses the sealing behavior of gaskets according to the gasket testing procedure HPIS Z104 established in Japan. The testing procedure consists of eleven gasket stress levels while the internal pressure is constant. It takes about 3 hours to complete one test, which is acceptable for gasket manufacturers. The test method is going to be effective as the Japanese Industrial Standard (JIS) soon. Several sheet gaskets and spiral wound gaskets were tested based on the test method HPIS Z104 and test results are compared and discussed in this paper. Based on the test results, experimental formulas are proposed to approximate the sealing behavior of gaskets. It is shown that the sealing behavior of gaskets can be well characterized using the proposed testing procedure and the experimental formulas. The formulas have the possibility of application to the design of gasketed bolted flanged connections. It is also shown that the sealing performance of spiral wound gaskets with graphite and PTFE fillers is as good as that of sheet gaskets under an equal gasket load.

Measurements and Evaluation of Sealing Behavior of Gaskets Based on the Test Method HPIS Z104 Proposed in Japan

2007 ◽  
Author(s):  
Takashi Kobayashi
Keyword(s):  
Internal Pressure ◽  
Testing Procedure ◽  
Test Method

This paper discusses the gasket testing procedure HPIS Z104 established in Japan to obtain fundamental sealing behavior of gasket. The testing procedure consists of 11 combinations of gasket stresses and a constant internal pressure. It takes about 3 hours to complete one test, which is acceptable for gasket manufacturers. In order to demonstrate the validity of the testing procedure, measurements of leak rates of several types of sheet gaskets are carried out. Experimental formulas are proposed to approximate the sealing behaviors of gaskets. It is shown that the sealing behavior of gaskets can be well characterized using the proposed testing procedure and the experimental formulas.

A Rapid Testing Procedure to Characterize Fundamental Sealing Behavior of Gaskets

2005 ◽  
Author(s):  
Takashi Kobayashi
Keyword(s):  
Testing Procedure ◽  
Leak Rate ◽  
Rapid Testing ◽  
Reasonable Time ◽  
Bubble Test ◽  
Fiber Sheet ◽  
Internal Pressures

In this paper, a testing procedure to obtain fundamental sealing behavior of gasket is discussed. The testing procedure consists of 12 combinations of gasket stresses and internal pressures. It takes about 3 hours to complete one test, which is acceptable for gasket manufacturers. In order to clarify the validity of the testing procedure, measurements of leak rates of compressed fiber sheet gaskets were carried out and also experiments to check a detectable leak rate by the soapy bubble test were carried out separately. It has shown that the fundamental sealing behavior can be well characterized using the proposed testing procedure with reasonable time and cost.

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