790 resultados para Pipe fittings


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"Contained herein are general conditions, forms of proposal, agreements and bonds, State Architect's standard specifications for mechanical, electric and elevator works."

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Mode of access: Internet.

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"December 1995."

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The Native Americans and Nature in Illinois activity book from the Illinois Department of Natural Resources (IDNR) is designed to supplement your curriculum in a variety of ways. The information and activities contained in this publication are targeted to grades kindergarten through three and can help you meet the following Illinois Learning Standards: 16.A.1a; 16.C.1a (U.S.).

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v. 1. Introduction. Britannia's pastorals. Books I and II.--v. 2. Britannia's pastorals. Book III. The Shepherd's pipe. The inner Temple masque. Miscellaneous poems. Notes. Index of names.

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"Authorities consulted" at beginning of each volume.

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With reproductions of original title-pages.

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For 1-4 men's voices with and without piano acc.

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Selected references: p. 27-28.

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1917-1928 Issued by the Association under Its Earlier Name: United Association of Journeymen Plumbers and Steam Fitters of the United States and Canada (on Cover: United Association, Journeymen Plumbers, Gas-Fitters, Steam-Fitters and Steam-Fitters Helpers, United States and Canada; Other Slight Variations)

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The initiation of stress corrosion cracking (SCC) was studied using scanning electron microscope observations of linearly increasing stress test specimens. SCC initiation from the following surfaces was studied: (i) initiation from the commercial pipe surface covered by the Zn coating, (ii) initiation from a mechanically polished surface with a deformed layer, and (iii) initiation from an electro-polished surface. SCC initiation involved different features for these surfaces as follows. (i) For the Zn coated commercial pipe surface, a crack in the Zn coating led to the dissolution of the deformed layer and when the deformed layer was penetrated, intergranular SCC initiation became possible. (ii) For a mechanically polished surface with a deformed layer, cracks in the surface oxide concentrated the anodic dissolution to such an extent that there was transgranular SCC in the deformed layer. SCC was intergranular when the deformed layer had been penetrated. Transgranular stress corrosion cracks were stopped at ferrite grain boundaries (GBs) oriented perpendicular to the SCC propagation direction. (iii) For an electro-polished surface, the surface oxide film was cracked at many locations, but intergranular SCC only propagated into the steel when the oxide crack corresponded to a GB. An oxide crack away from a GB is expected to be healed. The observed SCC initiation mechanism was not associated with simple preferential chemical attack of the ferrite GBs. (C) 2003 Elsevier Ltd. All rights reserved.