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Q. Process of Alloy Materials Sampling?
The following alloy-materials require a minimum of 10% per lot representative PMI sampling. If any incorrect material is found in representative sample basis testing, 100% PMI verification shall be required.
• Tubular products used in the fabrication of equipment, such as heat exchangers and boilers, provided that traceable mill certification is available.
• Fired heater, heat exchanger, and boiler internals example: tube hangers, tube supports, and tube-sheets. Internals which are part of the supports in fired heaters and boilers are also included in the PMI program.
• All alloy steel bolting, fasteners and nuts.
• Ring joint flange and clamp type (e.g., Grayloc) connector flange gaskets.
• Internal non-pressure-containing parts. Metallic alloy components for refractory linings (e.g., refractory anchors and hex mesh) shall be covered under this requirement.
Capacitor Discharge Welding This is used for welding of studs, welding of thermocouples, etc. on the base metal. A low voltage, high amperage electrical discharge from a capac
Derive the relation ship between volumetric efficiency & clearance.
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Q. Explain working of Steam Sampling? Sample coolers shall be supplied by the Vendor. A common sample spillage trough shall also be provided by the Vendor, with a cover screen
The attached figure depicts an indirectly fired gas turbine engine. In the gas turbine engine, air is compressed to a high pressure and then heat is added. The high pressure, high
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