Technical Clarification for Shaft Material of Condensate Extraction Pump: Subject: Shaft Material Clarification FEED Requirement: Cl. no. 6.5.7.4 "The shaft‚ impellers‚ stationary and rotating wear rings shall be stainless steel. The casing shall be carbon steel. Materials shall comply with API 610 Appendix H‚ material class S-8." Explanation: SDC contacted to all reputed suppliers for Condensate pump in Korea & Japan. They have majorly suggested the below mentioned material of construction
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Chemistry Essay On Metals Iraj Malik 12/10/2012 MYP-5 The International School A metal is defined as a chemical element that is malleable and ductile‚ usually solid‚ has a characteristic luster‚ and is a good conductor of heat and electricity‚ e.g. copper or iron. Metals form oxides that are basic‚ they are good reducing agents and metals have lower electro negatives.There are many properties of metals. The chemical properties are that they can combine together with other metals to form
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The History of Art Sculpture has filled roles in human lives for centuries. The earliest scultpure was used to provide hunters with help. Later‚ statues were used to represent Gods‚ Kings‚ and Queens. Churchs were decorated with demons as a reminder of the evil that is present in the christians lives. Scupture has been monumental from the beginning and still on going. During the 15th century monuments of bibical herors were built in Italin cities. In the 20th centurcy monuments to artist were built
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available exchanges is better) Repulsion energy is destabilizing (ΠC>0)‚ exchange energy is stabilizing (Πe<0) Π = ΠC + Πe Electrons are placed in orbitals to give the lowest total energy to the atom Orbitals filled using Aufbau Chromium‚ Molybdenum‚ Copper‚ Silver‚ and Gold are all exceptions to the Aufbau principle Cr: [Ar] 4s1 3d5 Many times‚ half-filled and completely filled orbitals are unusually stable‚ so sigma electrons can rarely end up promoted to pi electrons
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bones and cell structures‚ regulating the body’s pH‚ carrying charge‚ and driving chemical reactions. The FDA has set a reference daily intake for 12 minerals (calcium‚ iron‚ phosphorous‚ iodine‚ magnesium‚ zinc‚ selenium‚ copper‚ manganese‚ chromium‚ molybdenum and chloride). Sodium and potassium also have recommended levels‚ but they are treated separately. However‚ this does not exhaust the list of elements that you need. Sulfur is not usually mentioned as a dietary supplement because
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Pollution 1 Pollution Pollution is the introduction of contaminants into the natural environment that cause adverse change.[1] Pollution can take the form of chemical substances or energy‚ such as noise‚ heat or light. Pollutants‚ the components of pollution‚ can be either foreign substances/energies or naturally occurring contaminants. Pollution is often classed as point source or nonpoint source pollution. Ancient cultures The litter problem on the coast of Guyana‚ 2010 Air pollution
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History of C++ The C++ programming language has a history going back to 1979‚ when Bjarne Stroustrup was doing work for his Ph.D. thesis. One of the languages Stroustrup had the opportunity to work with was a language called Simula‚ which as the name implies is a language primarily designed for simulations. The Simula 67 language - which was the variant that Stroustrup worked with - is regarded as the first language to support the object-oriented programming paradigm. Stroustrup found that this
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Operating System An operating system (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs. It is a program designed to run other programs on a computer. The operating system is an essential component of the system software in a computer system. Application programs usually require an operating system to function. Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software
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example‚ diacetyl has been showed to cause acute-onset bronchiolitis obliterans‚ which is a severe and irreversible obstructive lung disease (Rowell and Tarran‚ 2015‚ p. 8). Chemists have found various levels of chemical metals in vapor including chromium‚ nickel‚ tin‚ silver and aluminum when the heating elements of e-cigarettes are operated at high voltage. These chemical findings have also been related to findings in combustible cigarette usage. E-cigarettes also may potentially contain harmful
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Chemistry 121 Worksheet 3 (Fall 2013) 1) Determine the mass‚ in g‚ of a) 7.34 mol N 2O 4 b) 3.16 ×1024 O 2 molecules c) 18.6 mol CuSO 4 ⋅ 5 H 2O d) 4.18 ×1024 molecules of C2 H 4 (OH) 2 e) a quantity of the amino acid lysine‚ C6 H14 N 2O 2 ‚ containing 3.03 mol N atoms 2) Determine the number of moles of a) N atoms in a sample of C7 H 5 (NO 2 )3 that has the same number of O atoms as 12.4 g C6 H12O6 b) Br2 in a sample consisting of 2.17 ×1024 Br atoms c) N atoms in 43.5 g
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