Bucket Elevators - Technical Expressions

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SPECIFICATION POTASH: COMPACTOR EXPANSION SECTION: 41 12 16 BUCKET ELEVATORS EQUIPMENT SPECIFICATION ENQUIRY NUMBER: REV. A, PAGE: 2 OF 10 north-south, then east-west). Pipe threads shall conform to ASME B1.20.1. 4. MECHANICAL REQUIREMENTS 4.1 General 4.1.1 All mechanical equipment and components shall be designed and supplied in accordance with the requirements in this section and in Section S11 00 50, Basic Mechanical Requirements. 4.1.2 All materials and components used to construct the equipment shall be new and free of defects. 4.1.3 Imperial Units shall be used for all dimensions and physical units. 4.2 Equipment Vibration 4.2.1 The general requirements are set forth in Section S01 80 15.19, General Noise & Vibration. 4.3 Materials of Construction 4.3.1 Materials of construction shall be compatible with the process medium and operating environment. All equipment components shall be designed such that corrosion and wear are minimized. 4.3.2 All materials specified herein shall be reviewed for corrosion and erosion resistance with applicable allowances made where required. Wear resistant liners shall be used especially at the feed and discharge of the elevator. 4.3.3 All materials shall be new, of the highest quality, type and grade specified. 4.3.4 The boot section of all bucket elevators shall be 316L stainless steel. All other casing elements shall be mild steel. 4.3.5 The buckets as well as the inlet and discharge of the Dried Product Bucket Elevator, the Compaction Plant Feed Bucket Elevator and the Granular Coarse Product Bucket Elevator shall be fabricated from Corten A steel. On the Product Bucket Elevator and the Polishing Screen Feed Bucket Elevator, these parts may be fabricated from mild steel. 4.3.6 All buckets shall have a wear lip and be reinforced with a 3 mm thick metal strip, fully welded on both sides to resist filling impact load. PTMFOG0000000184.Doc ©Hatch 2004/12
SPECIFICATION POTASH: COMPACTOR EXPANSION SECTION: 41 12 16 BUCKET ELEVATORS EQUIPMENT SPECIFICATION ENQUIRY NUMBER: REV. A, PAGE: 6 OF 10 located at the centroid, such that the item remains vertical and stable whilst being lifted. 4.6.2.3 Each lifting lug shall be designed to handle the entire empty weight of the equipment. 4.6.2.4 Elevator casing at locations requiring regular inspection and maintenance (for example where bearings are located) shall be split such that removal of required part of the casing is possible without dismantling of external chutes and duct work. 4.6.3 Manways/Access Doors 4.6.3.1 All man ways shall have a minimum opening of 750 mm. 4.6.3.2 Permanently installed davits shall be used for man way weighing more than 25 kg, where frequent access is required. 4.6.3.3 Manways shall not interfere with other mechanical equipment or block access ways when open. 5. FABRICATION REQUIREMENTS 5.1 Welding 5.1.1 Welding shall comply with the requirements of Section IX of ASME code and AWS and shall be performed by welders qualified and certified in such welding procedures. Welding procedures, weld maps and procedure qualification records shall be submitted to the Owner/Engineer for review prior to the start of fabrication. 5.1.2 All joints shall be continuous seal welds. No interruptions, gaps or exceptions are allowed. All welds shall be full penetration, full fusion and free of undercut, craters and surface cracks and porosity. 5.1.3 Welds shall be thoroughly de-scaled after welding. 5.1.4 Post weld heat treatment shall be performed on welded items where required by the Code or called out in the specification. 5.1.5 With the bid, the Vendor shall submit a quality control plan detailing roles of different parties, including Owner/Engineer. NDE maps and procedures shall be submitted by the Vendor for review. PTMFOG0000000184.Doc ©Hatch 2004/12
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Bucket Elevators - Technical Expressions

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