ANALISIS PENGARUH JARAK KAMPUH HASIL PENGELASAN BAJA SS400 TERHADAP SIFAT MEKANIK MATERIAL MENGGUNAKAN METODE GMAW

2020 ◽  
Vol 8 (2) ◽  
pp. 57-66
Author(s):  
Novi Laura Indrayani ◽  
Herry Oktadinata ◽  
Ito Suteja
Keyword(s):  
Hardness Test ◽  
Butt Joint ◽  
Test Results ◽  
Destructive Test ◽  
Microstructure Observation ◽  
A Value ◽  
Welding Defects ◽  
Protective Gas ◽  
Non Destructive

Welding techniques have been used extensively in the construction field because welding techniques are a simpler method in the process of connecting steel than using bolts or rivets. Factors that influence the quality of welding results include distance of the seam. The seam distance can affect the increase in heat input value because the wider the seam distance the more filler metal will be used. The purpose of this study was to determine how the effect of variations in the distance of the seam to the mechanical properties of SS400 steel welding material using the GMAW method. SS400 steel welding welding position 2G with variations in the root gap distance of 0 mm, 2 mm and 4 mm using the GMAW method with a type of protective gas 82% Ar + 18% CO2 and ESAB ER70S-6 type welding wire. Single v butt joint type with a seam angle of 60o and 12 mm thick material. In this study several tests were conducted including distortion testing, non-destructive test, tensile, chemical composition, hardness and microstructure observation. The highest distortion test results obtained at a root gap of 4 mm seam, non-destructive test results showed no welding defects in the upper surface of the weld, the optimal tensile testing results were obtained on a sample root gap of 2 mm with a tensile strength value of 413 MPa and fractures that occurred in the base area metal. The highest hardness test results were obtained at a sample root gap  of 0 mm ap with a value of 235 HV and the lowest hardness obtained at a root gap of 4 mm with a value of 209 HV.

scholarly journals APLIKASI NON DESTRUCTIVE TEST PENETRANT TESTING (NDT-PT) UNTUK ANALISIS HASIL PENGELASAN SMAW 3G BUTT JOINT

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Tito Endramawan ◽  
Emin Haris ◽  
Felix Dionisius ◽  
Yuliana Prinka
Keyword(s):  
Mild Steel ◽  
Welding Process ◽  
Butt Joint ◽  
Test Results ◽  
Acceptance Criteria ◽  
Destructive Test ◽  
Non Destructive ◽  
Penetrant Testing

The purpose of the research are determine acceptance criteria the specimen based on ASME standard. The research used mild steel materials with hardness 220 HVN with sized 30 cm x 20 cm x 1.2 cm then  SMAW welding process position of 3G buttjoint with rooting electrode LB 52U diameter 2.6 mm used current 70 Amper and voltage 380 volt, for Filler used LB 5218 electrode 3.2 mm with current of 80 Amper and voltage of 380 volts. The welding process influenced by many factor which cause failure. The method for inspect result of weld used Non Destructive Test Penetrant Testing (NDT PT) and used ASME standard for acceptance criteria. The test results showed the discontinuity of porosity on the surface of the welded product in specimen 1 is the largest rounded 5 mm at 233 mm distance so that based on the acceptance criteria of AWS standard, the welding result is accepted and the specimen 2 there is discontinuity at 233 mm with the size of 8 mm so that Otherwise rejected. This rejected result can be improved by gouging the discontinuity and then welded.

scholarly journals ANALISIS UJI TIDAK MERUSAK PADA SAMBUNGAN LAS LAMBUNG FRAME 103 BAGIAN KAMAR MESIN KAPAL PATROLI 73 DENGAN METODE RADIOGRAPHY TEST

2020 ◽  
Vol 20 (4) ◽  
pp. 146-152
Author(s):  
Sulaiman Sulaiman ◽  
Budi Utomo ◽  
I Putu Agung Ardi Wijana
Keyword(s):  
Plate Thickness ◽  
Test Results ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Advantages And Disadvantages ◽  
Welding Defects ◽  
Almost All ◽  
Non Destructive ◽  
Good Preparation

Non-Destructive Test is a supporting tool that is highly relied upon by the activities of controlling and ensuring the quality of a welding. Radiography test is one of the non-destructive tests that uses gamma rays that can penetrate almost all metals so that it can be used to reveal defects or discrepancies behind metal walls or within the material itself. The purpose of this paper is to know, plan a non-destructive testing activity with radiography test which includes the understanding along with the equipment needed during the testing process, what devices contribute to the testing process, as well as knowing the advantages and disadvantages of the test radiography. The method used in This writing is by experiment with welding connection frame 103 Patrol Ship 73 engine rooms. Radiography Test results found no welding defects on the inside of the welding as deep as a plate thickness, so that otherwise passed the checking received by BKI. Good preparation and consideration are needed before conducting this test.

scholarly journals EKSTRAK KARAGINAN RUMPUT LAUT (Eucheuma cottonii) YANG DIPEROLEH DARI PANTAI TABLOLONG

2021 ◽  
Vol 3 (3) ◽  
pp. 119-127
Author(s):  
Runa Matias Ruku ◽  
Alfred G.O Kase ◽  
Hartini R.L Solle
Keyword(s):  
Fat Content ◽  
Ash Content ◽  
Test Results ◽  
A Value ◽  
Randomized Design ◽  
Yield Test ◽  
Completely Randomized Design ◽  
Quantitative Descriptive ◽  
Treatment Concentration

ABSTRACTEucheuma cottonii (E. cottonii) seaweed is a low level plant that has a high nutritional value. One of the ingredients that play a role in the formation of texture is carrageenan.Carrageenan is a type of hydrocolloid extracted from the seaweed of the red algae group (Rhodophyceae). The purpose of this study was to determine the quality of yields of Seaweed Carrageenan Extract (E. cottonii) obtained from Tablolong beach in the form of yield, ash content and fat content. The method used in this study is an experimental method with a completely randomized design (CRD) and for fat testing using quantitative descriptive methods. This study uses various concentrations of 0.1 N KOH, 0.2 N KOH, 0.3 N KOH and 0.4 N KOH. The results of the carrageenan yield test show that the addition of 0.1 N KOH concentration has a value of 56.10, KOH 0 , 2 N 62.16, KOH 0.3 N 72.73 and the best treatment was at P4 KOH 0.4 N 80.90. Carrageenan ash content test results showed that the addition of KOH concentration value obtained P1 KOH 0.1 N was 60.50, P2 KOH 0.2 N was 70.70, P3 KOH 0.3 N was 80.50, and P4 KOH 0.4 with a value of 90.50. The results of the carrageenan fat content of 0.1 KOH treatment has a fat content of 0, 2 while the treatment of KOH 0,2, KOH 0,3, KOH 0,4 have no fat content by showing the value (0). The results showed that the highest yield in the treatment of KOH concentration of 0.4 N with a value 80.95% and carrageenan ash content has the highest value in the treatment concentration of 0.4 N with a value of 90.50% while the fat content has a value of 0.2 in the treatment of KOH concentration of 0.1 N Keywords: Carrageenan, extract of E. cottonii seaweed.

scholarly journals The base colour of fruit as an indicator of optimum harvest date for two apple cultivars (Malus domestica Borkh.)

2012 ◽  
Vol 24 (1) ◽  
pp. 81-89 ◽  
Author(s):  
Grzegorz Łysiak
Keyword(s):  
Malus Domestica ◽  
Fruit Production ◽  
Harvest Date ◽  
Skin Colour ◽  
A Value ◽  
Colour System ◽  
Apple Cultivars ◽  
Harvest Maturity ◽  
Non Destructive

The base colour of fruit as an indicator of optimum harvest date for two apple cultivars (Malus domesticaBorkh.)The CIE L*a*b*colour system is used to evaluate food colours. Its advantage is that the base skin colour in apples can be measured on the same fruit before and on the optimum harvest date. The aim of the research conducted between 2002 and 2006 was to evaluate a quick and non-destructive method of determining the optimum harvest date of apples intended for long storage based on the changes observed in the base skin colour. Another important research aspect was to compare this method with other methods or indicators used to determine the harvest date. The colour measurement was conducted on two apple cultivars, Šampion and Royal Gala, with the aim of, amongst other factors, establishing a standard for each that could be used in practice in fruit production. From amongst the evaluated colour indicators L*, a*, b*, Hueabangle and chroma, changes in the base colour were best illustrated by the a*coordinate value and Hueabangle value. Based on the evaluation of the quality of fruits after storage, it can be stated that the fruits had the best quality when the a*coordinate during harvest ranged between -7 and -8 for ‘Šampion' and between -3 and -5 for ‘Royal Gala’. The Hueabangle assumed a value between 100 and 101 for ‘Šampion' and between 96 and 99 for ‘Royal Gala’ during the optimum harvest date. Therefore, the a*coordinate and the Hueabangle can be used to indicate harvest maturity.

scholarly journals 120 PENERAPAN STANDAR UJI TANPA MERUSAK UNTUK MENENTUKAN SISA UMUR PIPA KETEL UAP PADA UNIT PEMBANGKIT LISTRIK TENAGA UAP

2008 ◽  
Vol 8 (3) ◽  
pp. 120
Author(s):  
Supriadi Supriadi
Keyword(s):  
Hardness Test ◽  
Thickness Measurement ◽  
Test Methods ◽  
Life Assessment ◽  
Remaining Life ◽  
Boiler Tube ◽  
Destructive Test ◽  
Electrical Generator ◽  
Remaining Life Assessment ◽  
Non Destructive

<p>Application of standard for remaining life assessment at boiler tube of steam powered electrical generator unit by<br />non-destructive test (NDT), up to now has been very important. The condition of boiler tube used in electrical<br />generator in Indonesia has reached its design limit and even some of them have replaced. This research used nondestructive<br />test methods by SNI, JIS and API standard and was conducted at boiler unit II in Indonesia, that has<br />already in 25 years operated. This method consists of several technique approaches that are: replica methods<br />(microstructure), hardness test, outside diameter measurement (OD), and wall thickness measurement. After<br />assessment and analysis, the results of non destructive test methods showed that the remaining life of boiler tube<br />is 100.000 to 120.000 operation hours.</p>

scholarly journals Non-destructive testing of concrete treated with penetrating surface sealant using a Karsten-tube

2018 ◽  
Vol 199 ◽  
pp. 07010
Author(s):  
Sunday O. Nwaubani
Keyword(s):  
Water Uptake ◽  
Initial Moisture Content ◽  
Concrete Surface ◽  
Concrete Durability ◽  
Test Results ◽  
Destructive Testing ◽  
Previously Treated ◽  
Non Destructive ◽  
Exposure Conditions

Surface treatment is increasingly becoming acceptable as a means of ensuring concrete durability by way of controlling or preventing the ingress of various deleterious agents of concrete deterioration. In practice, a combination of non-destructive and semi-destructive evaluation of the concrete surface is often necessary to decide on the need for treatment or re-treatment of previously treated surfaces. The owners of structures and restorers appreciate simple and non-destructive methods in making any interventions on surfaces that have been treated previously. Existing knowledge would suggest that correct interpretation of these test results would depend on an understanding of the effect of factors such as the initial moisture content, quality of the concrete and exposure conditions. This paper presents the result of a study to assess the applicability of the “Karsten-tube” in measuring the water uptake of treated and un-treated concrete surfaces and the effects of the concrete quality, and environmental conditions upon the test results. The results are compared with complementary tests for oxygen permeability and porosity of the concrete specimens studied. Three concrete mixes and five different exposure conditions were investigated. Some specimens were soaked in 3% Sodium Chloride solution to study the effects of aggressive agents. The results indicates that Karsten-tube is a quick non-destructive method for obtaining useful information about the condition of treated and un-treated concrete surfaces and could be used for rapid and reliable assessment of the need for re-treatment of previously treated surfaces. Well-treated surfaces will have low water uptake values, irrespective of the quality of the concrete.

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