Metallic Expansion Joints - Thorburn Flex Inc

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THORBURN FLEXIBLE PIPING SPECIALIST TYPICAL DESIGN SPECIFICATIONS FOR THORBURN METALLIC BELLOWS TYPE EXPANSION JOINTS INTRODUCTION ■ To provide a sample specification for the fabrication, inspection and shipping of metallic bellows type expansion joints. Certain optional procedures are shown and will be followed when specified. DATA REQUIRED Size Qty Dimension limits Axial Motion (Compression) Extension Lateral Motion Angular Motion Design Pressure (Internal) (External) Design Temperature ºF or ºC Cycle Life BELLOWS ELEMENT ■ Manufactured from large sheets producing longitudinal welds only. All welds planished to within 3% of parent metal thickness. Material thickness of sheet to be within commercial tolerances. MATERIALS ■ ■ Bellows – T.321 stainless steel is standard. Readily available in T.316, T.304, Monel, Inconel, Incoloy, Hasteloy, etc. in thicknesses to .187". Materials shall be free from imperfections that would interfere with the purpose designed. All materials to meet ASM or ASME Code Section II if applicable. DESIGN ■ ■ Expansion joints are designed to meet known requirements of EJMA, ASME B31.3 Appendix X or ASME Section VIII if applicable. The expansion joint shall be free of all control devices such as self-equalizing rings. DRAWINGS ■ ■ The approval drawing shall show all principal dimensions including the number, size and thickness of bellows, location and type of welds (optional). The drawing shall list the movement, pressure and temperature rating, materials, test pressure, order number and project name (optional). HEAT TREATMENT ■ When specified, heat treatment will be performed. WELDING ■ ■ ■ Unless otherwise specified, the welding procedures and welders shall be qualified to Section IX of the ASME Boiler and Pressure Vessel Code for all pressure containing welds. Longitudinal welds in bellows and transition pieces shall conform to ASME Section VIII and Section IX (optional). Welding of bellows to transition pieces shall be to Code Case 1177.7 (optional). Page 22
THORBURN FLEXIBLE PIPING SPECIALIST TYPICAL DESIGN SPECIFICATIONS FOR THORBURN METALLIC BELLOWS TYPE EXPANSION JOINTS INSPECTION ■ The expansion joint is inspected to meet designated requirements. ■ A partial data report shall be produced per ASME Section VIII and Code Case 1177.7 (optional). ■ All pressure butt welds shall be subjected to a liquid penetrant examination by experienced operators in the presence of an authorized inspector (optional). ■ All longitudinal seams of bellows and transition pieces shall be radiographed per ASME Section V (optional). ■ Certificate of compliance will be forwarded on completion of project (optional). TESTING ■ All pressure welds shall be leak tested by either liquid penetrant examination to ASME Section V or internal pressure test. ■ The expansion joint shall be hydrostatically tested to 1.5 times the operating pressure (or design pressure). Hydrostatic tests include the testing of the rods and attachments when they are an integral part of the expansion joint (optional). REPORTS AND RECORDS ■ Applicable records listed below will be kept available for examination by the purchaser's inspector. • Welding procedure specifications • Operators' welding qualification test results • Radiographic films (optional) • Certified mill test reports (optional) • A partial data report (optional) ■ A clear indication of records, reports, inspection and tests required shall be stated at the time of placing purchase order. MARKING ■ Each expansion joint will have attached to it the Thorburn stainless steel nameplate, showing our Company name and address, pressure rating and temperature rating. ■ Expansion joints with flow liners will have a flow direction arrow painted visibly on the unit. ■ Markings indicating P.O. number, project number, part number and customer coding if required must be specified (optional). SHIPPING ■ Expansion joints will be supplied with shipping bars and positioning devices for holding the joint in the required installation position during shipping and erection. These will be painted yellow and tagged with instructions for removal after installation. ■ Standard protective paint will be applied to all surfaces unless otherwise specified. The bellows shall not be painted. ■ Expansion joints will be supplied on skids, or loaded and blocked as deemed necessary for shipping. ■ Protective coatings, coverings, end protection and special packaging may be provided as optional. ■ The following "Installation Instruction Tag" will be on each expansion joint. Page 23
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THORBURN'S NON-METALLIC EXPANSION J
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Metallic Expansion Joints - Thorburn Flex Inc

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