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SP0178-2007 <br /> Inside of Tank or <br /> Vessel <br /> Tank Shell --+ <br /> This area is inaccessible for <br /> lining application <br /> Screwed Nipple for Use During Internal Dished Head <br /> Fabrication and Heat Curing of <br /> Thermosetting Linings <br /> It is recommended that 1111111111111111 ■ <br /> the plug be left out for <br /> venting and the hole plugged — <br /> with grease to prevent Installation of Curved(Preferred)or Flat <br /> atmospheric corrosion of Plate,Fully Seal-Welded and Ground,to <br /> the threads. Eliminate Inaccessable Area for Proper <br /> Surface Preparation and Lining in <br /> Mufti-Compartment Tanks Constructed with <br /> Dished Heads Between Compartments <br /> FIGURE A9 <br /> A technique (detail of fabrication) to allow for good continuity of lining application for inaccessible areas such as those in <br /> multicompartment tanks or vessels. <br /> �2S mm(1.0 in.)thread nipple <br /> 1111111 <br /> . ' . f en alloy sig fleange is required, <br /> the designer should consider <br /> 111 the use of insulating sleeves <br /> and washers as a protection <br /> Slip-on Flange ■ 50 mm ■ against galvanic corrosion. <br /> (2 in.) <br /> inside <br /> Overall length shall be as <br /> short as possible. <br /> WNW ANEW1 Line completely to bolt <br /> Inside of Tank or Vessel circle. <br /> Grind and Radius <br /> FIGURE A10 <br /> Minimum 50-mm(2-in.)diameter nozzle required for most thin-film linings.Thicker-film linings may require a larger-diameter <br /> nozzle. This diagram also illustrates fabrication practice where a threaded connection is required in a tank or vessel that requires <br /> a holiday-free lining. <br /> 10 NACE International <br /> 193 <br />