1 General Provisions
1.0.1 This code is formulated with a view to strengthen technology and quality management of rolling mill mechanical equipment installation, further standardize construction technology of rolling mill mechanical equipment installation, and ensure construction quality.
1.0.2 This code is applicable to installation of rolling mill mechanical equipment related to construction, extension and renovation.
1.0.3 For the rolling mill equipment with special requirement, its technical requirements for installation shall meet the requirements of equipment technical document.
1.0.4 For some auxiliary facilities such as cranes, dedusting equipment, fan, pump, and all kinds of medium piping and processing steel structures involved in rolling mill mechanical equipment installation, their fabrication and installation, anti-corrosion and heat insulation shall meet the requirements of current national standards, i. e., " General code for construction and acceptance of mechanical equipment installation engineering" (GB50231), " Code for construction and acceptance of crane installation engineering" (GB50278), " Code for installation and quality acceptance of metallurgical dedusting equipment" (GB50566) and " Code for construction and acceptance of fan, compressor and pump installation" (GB50275).
1.0.5 For rolling mill mechanical equipment installation, not only the requirements stipulated in this code, but also those in the current relevant ones of the nation shall be complied with.
2 Basic Requirement
2.0.1 The company involved in rolling mill mechanical equipment installation shall have corresponding project construction qualification； the construction site shall establish corresponding technical construction standard, perfect safety and quality management system. Technical documents such as construction organization design, statement of construction method and work activity design etc, which already approved by authorities shall be provided.
2.0.2 Any modification for construction drawings shall be provided with the design change notification or technical verification sheet issued by the design company.
2.0.3 All testing apparatus or instruments have been calibrated and verified by authorities shall be used in rolling mill mechanical equipment installation and alignment.
2.0.4 Welders who shall be engaged in welding work of rolling mill mechanical equipment installation, shall possess special work safety operation certificate and professional qualification certificate, and can work for approved items and in recognized scope of work.
2.0.5 Rolling mill mechanical equipment installation shall be done in accordance with prescribed procedures.Self-inspection and special checking shall be conducted and records shall be retained after accomplishment of each working procedure. The next working procedure shall not be proceeded without inspection and confirmation of previous working procedure.
2.0.6 Secondary grouting of equipment and other concealed works prior to concealment for rolling mill mechanical equipment installation shall be qualified and approved by self-inspection. The construction company shall notify the supervision engineer and other relevant companies to conduct a site confirmation and sign an acceptance record for concealed works before concealed works is executed.
2.0.7 Prior to installation of the rolling mill mechanical equipment, the equipment foundation and work plant involved shall be basically accomplished, the condition for equipment installation is ready and the transportation road used for construction is open.
2.0.8 Civilized construction shall be required in rolling mill mechanical equipment installation. Waste oil, grease and cleaning fluid etc. occurred during construction shall be collected and processed and not allowed to be discharged arbitrarily to avoid the environmental pollution.
3 Equipment Foundation, Anchor Bolt and Packer
3.1 Inspection and Acceptance of Equipment Foundation
3.1.1 Foundation inspection and acceptance shall be done before equipment installation. For those unqualified foundation, the equipment shall not be installed on it.
3.1.2 Equipment foundation strength shall meet the requirements of technical design document.
3.1.3 Coordinates, elevation and geometrical dimensions for equipment foundation, and coordinates and elevation for embedded anchor bolts and reserved holes shall meet the requirements of the design documents and current national standard, i.e., "General code for construction and acceptance of mechanical equipment installation engineering" (GB50231).
3.1.4 Forms, crushed stones, soil and water shall be cleaned away from equipment foundation surface and reserved holes for anchor bolt.Screws and nuts for the embedded anchor bolts shall be well protected.
3.1.5 The bottom elevation and verticality of reserved holes for anchor bolt shall meet the requirements of technical design documents. Elevation, size of square opening and direction for embedded parts of reserved holes for T-type anchor bolt shall meet the requirements of design technical documents.
3.1.6 Settlement observation shall be done for main body foundation of rolling mill equipment, and settlement observation record and settlement curve shall be retained.
3.2 Baseline and Benchmark Setting up
3.2.1 Before installation of equipment, layout for baseline and benchmark shall be drawn and prepared in accordance with equipment process layout and survey control network, so as to determine locations of center reference peg and benchmark.Permanent center reference pegs and benchmarks shall be buried for center line of main axis of continuous production line and main equipment.
3.2.2 Permanent center reference pegs and permanent benchmarks (Figure 3.2.2) shall be buried firmly and well protected.
3.2.3 Baseline and benchmark survey for the entire equipment units shall be accomplished for one time.
3.2.4 Settlement observation point should be buried after inspection and handover of equipment foundation and start to observe.It is recommended that settlement should be observed at set intervals from 7 to 30 days and be drawn out its curve chart.
3.3 Anchor Bolt
3.3.1 Quality qualification certificate shall be provided for anchor bolt.
3.3.2 The anchor bolt installation of reserved holes shall be in accordance with the following requirements：
1 Remove oil and scale on the anchor bolt and appropriate grease shall be applied on the screw part.
2 Check if diameter and length （including screw length）of anchor bolt shall meet the requirements of technical design documents.
3 Anchor bolt installation shall be installed compatible with its verticality and kept away from the hole wall larger than 15mm，and shall not touch the hole bottom.Clearance shall be kept between anchor bolt and equipment anchor bolt holes after preliminary alignment of equipment is made.
4 Equipment surface shall be protected during the first-time and secondary grouting.
5 Final alignment for equipment shall be done and anchor bolts shall be tightened only after the concrete strength for reserved holes meets the design requirements.
3.3.3 Anchor bolt installation shall be in accordance with the following requirements：
1 T-type anchor bolt s diameter，length，mark，hammer head size，connection type between hammerhead and screw rod，and anti-corrosion shall meet the requirements of design document.
2 Fill the bolt sleeve with packing to close it before secondary grouting for equipment，which shall meet the requirements of design document.
3 Select suitable method and tool to tighten anchor bolt in accordance with the fastening force requirement and field working environment. Fastening force shall meet the requirements of design document.
