Improvement of Flange Tightening Method for Small Bore Low Rating Bolted Flanges

2010 ◽  
Author(s):  
Masako Mori ◽  
Akira Nebu ◽  
Takashi Kanno
Keyword(s):  
Axial Force ◽  
The Other ◽  
Test Results ◽  
Other Hand ◽  
Sealing Performance ◽  
Bolted Flange ◽  
Seating Surface ◽  
Spiral Wound

An appropriate flange tightening methods for small bore and low rating piping flange joints are clarified to improve the sealing performance of the bolted flange joints and the workability of flange tightening work. It is said that lubricant on the screw of the bolts and the nut-seating surface can minimize the variability of axial force acting on flange bolts, while this process might make it harder to tight the bolts uniformly especially for small bore low rating flanges. So, in this paper the appropriate condition to apply lubricant is clarified by a series of bolt tightening tests and sealing tests results. On the other hand, for the bolted flanges applying spiral wound gaskets, measuring the gasket compress dimensions help us to prevent uneven tightening balance and to perform the appropriate tightening work. Appropriate gasket compress dimensions are also clarified to ensure the sealing performance for the flanges based on the sealing tests results. Based on these test results, recommended flange-tightening methods have been summarized as an instruction and tightening work procedure to improve the sealing performance of the bolted flanges and the workability of flange tightening work.

Improvement of Flange Tightening Method for Small Bore Low Rating Bolted Flanges

2010 ◽  
Author(s):  
Masako Mori ◽  
Akira Nebu ◽  
Takashi Kanno
Keyword(s):  
Axial Force ◽  
The Other ◽  
Test Results ◽  
Other Hand ◽  
Sealing Performance ◽  
Bolted Flange ◽  
Seating Surface ◽  
Spiral Wound

An appropriate flange tightening methods for small bore and low rating piping flange joints are discussed to improve the sealing performance of the bolted flange joints and the workability of flange tightening work. The lubricant on the thread of the bolts and the nut-seating surface can minimize the variability of axial force acting on flange bolts, however this process might make it harder to tight the bolts uniformly especially for small bore low rating flanges. In this paper the appropriate condition to apply lubricant is clarified by a series of bolt tightening tests and sealing tests results. On the other hand, for the bolted flanges using spiral wound gaskets, measuring the gasket compressed dimensions help us to prevent uneven tightening balance and to perform the appropriate tightening work. Appropriate gasket compressed dimensions are also clarified to ensure the sealing performance for the flanges based on the sealing tests results. Based on these test results, recommended flange-tightening methods have been summarized as an instruction in tightening work procedure to improve the sealing performance of the bolted flanges and the workability of flange tightening work.

Interpretation of 25-OH-D3, NEFA, and calcium correlations among cow and calf pairs

2025 ◽  
Vol 77 (04) ◽  
pp. 6511-2025
Author(s):  
SONGUL ERDOGAN ◽  
KEREM URAL ◽  
HASAN ERDOGAN ◽  
DENIZ ALIC URAL ◽  
MEHMET GULTEKIN ◽  
...  
Keyword(s):  
Energy Balance ◽  
Vitamin D3 ◽  
Colorimetric Method ◽  
Negative Energy ◽  
The Other ◽  
Negative Energy Balance ◽  
Test Results ◽  
Blood Samples ◽  
Other Hand ◽  
Cow Calf

In the present study, the aim was to determine alteration of NEFA, calcium and vitamin D3 levels in cow and calf pairs at parturition as well as correlation between each parameter levels. For this purpose, a cow-side device employing the enzymatic colorimetric method was used for measurement of NEFA and calcium levels. On the other hand, serum 25(OH)D3 analysis was performed using the fluorescence immunochromatographic method at the laboratory in the Faculty. Blood samples were taken from Vena jugularis of 15 Simmental cow and calf pairs immediately after parturition and placed in serum and heparinized tubes. In cow and calf pairs, concentration of vitamin D3 (15.6-120 and 31.8-120 ng/mL, respectively), NEFA (0.12-1.2 and 0.09-0.8 mmol/L, respectively) and calcium (1.8 ± 0.9 and 2.2 ± 0.6 mmol/L, respectively) were determined. There was no significant correlation between NEFA, Ca, and vitamin D3 in cows and calf pairs. Taking into account several co-factors that influenced test results, which could not easily be excluded, further studies may be warranted with larger cow-calf pair populations. In conclusion, vitamin D3 concentration in calves is not affected by the negative energy balance of dams in the parturition period.

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.

scholarly journals PENGARUH GAYA KEPEMIMPINAN TERHADAP KINERJA KARYAWAN PADA LEMBAGA “BUMI DAMAI“ DESA KUWIRAN KECAMATAN KARE KABUPATEN MADIUN

2013 ◽  
Vol 1 (1) ◽  
Author(s):  
Ninik Srijani
Keyword(s):  
Data Collection ◽  
Statistical Methods ◽  
Leadership Style ◽  
Employee Performance ◽  
Positive Influence ◽  
T Test ◽  
The Other ◽  
Test Results ◽  
Other Hand ◽  
Regression Tests

<p>The purpose of this study was to influence of leadership style on employee performance in institution Bumi Damai Madiun. The sample in this study all existing employees in the institution Bumi Damai Madiun, totaling 34 people. Data collection using questionnaires. In analyzing the data used statistical methods to test the product moment correlation is valid whether or not the instruments used and the method of regression tests for testing the hypothesis put forward in this study. </p>The results showed that leadership style has relationships and a positive influence on the performance of employees at the Institute Bumi Damai Madiun. It is obtained from the correlation test that shows the value of rhitung is rtabel 0.339 0.740 whereas, on the other hand is 0.000 while the magnitude Sighit Sigprob 0.05. This means that the value rhitung ≥ rtabel (0.740 ≥ 0.339) or ≤ Sighit Sigprob (0.000 ≤ 0.05) meaning a rejection of H0 to show that leadership style has a relationship with employee performance on Institute <br /> Bumi Damai Madiun.  Further test results were also obtained Fisher, Fhitung value is 38.843 while the F table at 4.149, on the other hand is 0.000 while the magnitude Sighit Sigprob 0.05. This means that the value Fcount Ftabel ≥ (≥ 38.843 4.149) or ≤ Sighit Sigprob (0.000 ≤ 0.05) meaning a rejection of H0 which indicates that there is the influence of leadership style on the performance of employees at the Institute Bumi Damai Madiun. Besides t test results obtained, is 6.232 whereas tcount ttabel of 2.037, on the other hand is 0.000 while the value Sighit Sigprob 0.05. This means that tcount ≥ TTable (6.232 ≥ 1.694) or ≤ Sighit Sigprob (0.000 ≤ 0.05) meaning a rejection of H0 which shows that there are different leadership style influence on the performance of employees at the Institute Bumi Damai Madiun. R 2 of 0.548 results showed that 54.8% of employees affected by the performance variable leadership style, while the remaining 45.2% is influenced by other factors.

scholarly journals PENGARUH UPAH KERJA TERHADAP PRODUKTIVITAS KARYAWAN PADA HOME INDUSTRI JENANG "MILAH" DI KABUPATEN PONOROGO

2013 ◽  
Vol 1 (2) ◽  
Author(s):  
Safrida Riana Candra
Keyword(s):  
Data Collection ◽  
Positive Influence ◽  
Regression Testing ◽  
The Other ◽  
Employee Productivity ◽  
Test Results ◽  
Testing Method ◽  
Other Hand ◽  
Prevailing Wage ◽  
At Home

The purpose  of this study  was to determine  the prevailing  wage  in the home industry porridge  “MILAH”,    to determine  the productivity  of the employees  home industry porridge “MILAH”,    as well  as to determine  whether  or not the effect  of wages  on employee  productivity  at home industry  porridge "MILAH"  in Ponorogo.  The samples  in this  study  using  a sample  that  is saturated  all the  employees   home  industry  porridge “MILAH”, amounting  to 22 people.  Data collection  using documentation   and interview. In analyzing  the data used  for regression   testing  method  examines  the  hypothesis  proposed  in  this  study. The  results  showed  that  wages  have  relationships   and  a positive influence on employee  productivity  at home industry porridge  “MILAH”   in Ponorogo.  It is obtained  from the correlation  test showed  the value rhitung 0.867 whereas  rtable 0.423, on the other  hand  Sig(hit) is 0.000  while  the magnitude   Sig(prob) 0.05. This  means  that the value of rhitung &gt;= rtable (0.867 &gt;= 0.423) or Sig(hit) &lt;= Sig(prob) (0.000 &lt;= 0.05) meaning  a rejection  of H0 which shows  that wages  have a relationship  with  employee  productivity   at borne  industry  porridge  “MILAH”   in Ponorogo.  Further  test results  were also obtained  Fisher, Fhitung value is 60.542 while the value Ftable 4,351, on the other hand is Sig(hit) 0.000 while the magnitude   Sig(prob) 0.05. This  means  that the value  of Fhitung &gt;= Ftable (60.542&gt;= 4.351) or Sig(hit) Sig(prob) (0.000 d" 0.05) meaning  a rejection  of H0 which  indicates  that there are significant wage on employee productivity  at home industry porridge “MILAH”  in Ponorogo. Also  obtained  results  of the t test, thitung is 7,781 while ttable of 2,086, on the other hand Sig(hit) value  is 0.000  while  Sig(prob)  0.05.  this   means  that the value  of thitung &gt; ttable (7.781 &gt; 2.086)  or  Sighit&lt; Sigprob  (0.000  &lt; 0.05)  meaning  a rejection  of H, which  shows  that there are different  effects on the productivity   of the employee  wages at home industry  porridge "MILAH"   in Ponorogo.  Results  R2 of 0.752  indicates  that 75.20/0 of the variable  productivityof employeesaffectedbywagelabor,whiletheremaining24.8%isinfluencedby

scholarly journals RESEARCH ON SHEAR PERFORMANCE OF COMPONENTS CONNECTED BY BEECH AND SELF-TAPPING SCREW COMPOSITE DOWELS

Wood Research ◽  
2021 ◽  
Vol 66 (6) ◽  
pp. 955-968
Author(s):  
XUDONG ZHU ◽  
YINGYING XUE ◽  
XUEWEN ZHANG ◽  
PENGFEI QI ◽  
JIE SHEN ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Linear Equation ◽  
Failure Modes ◽  
Maximum Load ◽  
The Other ◽  
Test Results ◽  
Other Hand ◽  
Shear Performance ◽  
Group B ◽  
Better Than

This study examined the properties of components connected by beech and self-tapping screw composite dowels (group C). As a contrast, the components connected by beech dowels and self-tapping screws individually were tested. The test results indicated that the properties of the components connected by beech dowels (group B) were better than those connected by self-tapping screws (group S), except the ductility coefficient, final displacement, and energy consumption. On the other hand, the main failure modes of groups B and S were the broken beech dowel and the bent self-tapping screw, respectively. For group C, two peak values could be found which were larger than the maximum load of groups B and S, respectively. The properties of group C were better than those of groups B and S, except that the final displacement and energy consumption were located between those of groups B and S. Meanwhile, the linear equation in two unknowns have be found between groups B, S and C.

scholarly journals Stability and Volumetric Properties of Colored Asphalt Mixtures Containing Iron Oxide

2021 ◽  
Vol 24 (2) ◽  
pp. 130-136
Author(s):  
Samer Ali Naji ◽  
Alaa H. Abed
Keyword(s):  
Iron Oxide ◽  
The Other ◽  
Volumetric Properties ◽  
Oxide Content ◽  
Test Results ◽  
Other Hand ◽  
Marshall Test ◽  
The Stability ◽  
Limestone Dust ◽  
Marshall Stability

The objective of this paper is find the effect of using iron oxide as a filler on the Marshall stability, flow and the volumetric properties of HMA and compared the results with conventional HMA using limestone dust. Three blends were used: coarse, mid and fine with neat bitumen (AC 40-50). One aggregate type (crushed) with two types of fillers: limestone and iron oxide III (α- ) with three different filler content 6%, 8% and 10%. The Marshall mix design was conducted on the three blends and the optimum binder content is computed for each blend. The Marshall stability test results and the volumetric properties analysis showed that increasing the iron oxide content from 6% to 10%  increases the stability about 28%, 17% , 16% for the coarse , mid and fine mixtures respectively. This increment in stability of mixtures using iron oxide related to the increment in specific gravity of the mix (Gmb) by (1.3% to 1.5% about 30 to 50 kg/m3). On the other hand, the flow of mixtures is decreased about (5%) for mixes using iron oxide than the ones that used limestone as filler. The fine blend with 10% iron oxide exhibit the highest stability of 13.3 kN. While the coarse blend stability was 10 kN for the same filler type and content. Generally, the Marshall Test results of HMA using iron oxide as filler showed better resistance to plastic deformation, also produce denser HMA with higher stiffness. On the other hand, the volumetric properties analysis showed lesser values as compared with conventional mixture where the void in mineral aggregates and void filled with asphalt has decreased but within the acceptable limits.

scholarly journals A comparative Study of Some Physical Fitness Component’s’ Test Results for Players Applying to The National Center for Gifted In Taekwondo, Wrestling and Boxing Aged 10 – 15 Years Old

2021 ◽  
Vol 33 (1) ◽  
pp. 33-44
Author(s):  
Amwaj Mohammed Ali
Keyword(s):  
Physical Fitness ◽  
Comparative Study ◽  
The Other ◽  
Test Results ◽  
Fitness Components ◽  
Explosive Strength ◽  
Other Hand ◽  
Physical Abilities ◽  
Descriptive Method

The research aimed at comparing some physical fitness components (stamina, explosive strength, transitional speed, agility, etc) in players applying for the national center of gifted in taekwondo, wrestling, and boxing aged (10 – 15) years old. The researcher used the descriptive method on (107) divided (26) for taekwondo, (43) for wrestling, (34) for boxing. The data was collected and treated using proper statistical operations to conclude that players applying for taekwondo, wrestling and judo had no significant differences. On the other hand, there are significant differences in stamina, transitional speed, and explosive strength. In general, athletes applying for boxing surpassed other athletes in all physical abilities.

FEM Stress Analysis and Sealing Performance in Bolted Flange Connections With Cover of Pressure Vessel Subjected to Internal Pressure

2003 ◽  
Author(s):  
Toshiyuki Sawa ◽  
Rie Higuchi
Keyword(s):  
Internal Pressure ◽  
Contact Stress ◽  
Pressure Vessel ◽  
The Finite Element Method ◽  
Flange Connection ◽  
Bolt Preload ◽  
Sealing Performance ◽  
Bolted Flange ◽  
Contact Stress Distribution ◽  
Spiral Wound

The stresses of a bolted flange connection with a cover of pressure vessel (CPV) in which a spiral wound gasket is inserted, under internal pressure are analyzed taking account a hysteresis of the gasket by using the finite element method (FEM). The leakage tests were also conducted using an actual bolted flange connection with a CPV with a spiral wound gasket. Using the contact stress distribution of the bolted flange connection with a CPV under internal pressure and the tightness parameter, the values of the new gasket constants were obtained by taking into account the changes in the contact stress. A difference in the new gasket constants between the estimated values obtained from the actual bolted flange connection with a CPV and the values obtained by the PVRC procedure was small. In addition, a method to determine the bolt preload for a given tightness parameter was demonstrated. The obtained results of the bolt preload for the bolted flange connection with a CPV were in a fairly good agreement with those obtained by the PVRC procedure under a lower pressure application. However, a difference in the bolt preload was about 7% when the internal pressure was increased.

MMPI and EPPS Profiles of High and Low Verbal Interactors in Therapy Groups

1971 ◽  
Vol 28 (3) ◽  
pp. 951-955 ◽  
Author(s):  
Hanus J. Grosz ◽  
Robert Wagoner
Keyword(s):  
Personality Traits ◽  
Significant Degree ◽  
The Other ◽  
Psychometric Tests ◽  
Test Results ◽  
Verbal Interactions ◽  
Other Hand ◽  
Practical Usefulness ◽  
Group Members

The frequency of verbal interactions between patients in four open therapy groups was found to be to a statistically significant degree negatively correlated with scores on the L and K scales of the MMPI and the scale of Order on the EPPS, and positively correlated with the Ma scale on the MMPI and the scale of Aggtession on the EPPS. This was interpreted to mean that patients who on these psychometric tests are shown to be defensive are unlikely to interact with other group members as often as patients who score low on the trait of defensiveness. On the other hand, patients whose test results show them to be forceful, vigorous, aggressive, and candid are likely to interact with other group members more often than ere patients who score low on these personality traits. The findings were discussed in the light of previously reported similar investigations and with reference to their possible practical usefulness to group therapists.

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