SN/T 3512-2013Determination of tetrabromobisphenol A bis(2, 3-dibromopropyl ether) in electrical and electronic equipment. High performance liquid chromatography (English PDF)

5.1 General requirements

5.1.1 Lifting operators shall hold certificates when working.

the original approval procedures shall be re-approved.

5.2.2 When a new process or method is adopted for the first time, it shall be reviewed and approved by the technical person in charge of the enterprise.

5.2.3 Technical measures for lifting shall include but not be limited to the following.

- Project overview;

- Basis for preparation;

- Main parameters of equipment, components and lifting process methods;

- Calculation of stress in lifting process;

- The composition and job responsibilities of lifting operators;

- Technical, quality and safety requirements;

- Risk analysis and emergency plans;

- Summary table of lifting equipment and rigging;

- List of materials used for construction methods;

- Lifting process flow chart;

- Design drawings and calculations of self-designed slings and facilities, including lifting lugs, tensile connection plates, connecting shafts, spreader beams, reinforcements, etc.;

- Lifting floor plan, etc.

5.2.4 The force calculation shall include but not be limited to the following.

- Calculation of loads;

- Calculation of the location of the center of gravity of the equipment;

- Stress calculation in the lifting state (process) of the equipment, selecting machinery and rigging according to the maximum stress and calculating the safety factor;

- Verification of crane foundation bearing capacity;

- If necessary, verification of the entire or partial equipment and components.

5.2.5 The lifting floor plan shall include but not be limited to the following.

wire rope. Generally, the diameter of the winding drum shall be 16 to 25 times the diameter of the steel wire rope.

5.3.4.4 When multiple winches are used to lift equipment, their traction speed and lifting capacity shall match.

5.3.4.5 When multiple winches are used to lift equipment, each winch shall be equipped with a separated switch.

5.3.4.6 The insulation resistance of electrical equipment such as motors shall be greater than or equal to 0.5 Mohm.

5.3.4.7 The braking device of the winch shall be safe and reliable.

5.3.4.8 The resistance value of the winch protective grounding shall be less than 10 ohm.

5.3.5 Pulley (block)

5.3.5.1 The pulley (block) shall be used according to its rated lifting capacity. When the pulley block is used partially, the load shall be reduced in proportion to the corresponding number of pulleys.

5.3.5.2 Before use, the pulley grooves, axles, splints, hooks, rings, suspension beams

and other parts shall be inspected for defects such as cracks, damage, deformation.

5.3.5.3 The selection of the pulley (block) and the wire rope shall match. The diameter of the pulley shall usually not be less than 16 times the diameter of the wire rope; the inclination angle of the wire rope entering the pulley groove shall be less than 15°.

5.3.5.4 The minimum clear distance of the pulley block shall not be less than 5 times the wheel diameter.

5.3.5.5 The pulley (block) shall be maintained regularly.

5.3.6 Ground anchor

5.3.6.1 For the setting of ground anchor, it shall be excavated and buried according to lifting technical measures. A tensile test shall be carried out if necessary.

5.3.6.2 There shall be no trenches, cables, underground pipes, etc. within 2.5 times the pit depth in front of the ground anchor.

5.3.6.3 During the installation process of ground anchors, supervision and inspection

shall be carried out and concealed engineering records shall be kept. The records shall include geometric dimensions of the pit, concrete strength grade, embedded parts materials and welding quality, compaction conditions after burial, geology and landform of the location of the anchor pit, etc.

5.3.6.4 Ground anchors shall be pre-tensioned when setting them.

5.3.6.5 When backfilling the ground anchor, pure soil shall be used. Compact in layers, with the filling height of each layer not exceeding 300 mm. The backfill height shall be more than 400 mm higher than the ground around the foundation pit; water accumulation shall be prevented.

5.3.6.6 The concrete strength grade of concrete ground anchors shall not be lower than

C20.

5.3.6.7 When using buildings or structures as ground anchors, approval procedures shall be performed and corresponding calculation shall be carried out.

5.3.6.8 The use of ballast ground anchors shall be calculated and tested before use.

5.3.7 Lifting point location and lifting lugs

5.3.7.1 The position of the lifting point shall meet the following requirements.

- Facilitate equipment placement;

- Easy to observe the stress conditions of lifting equipment and rigging;

- Meet strength and stability requirements;

- There shall be sufficient working space for lifting equipment and rigging.

5.3.7.2 Lifting lugs shall meet the following requirements.

- The structure shall meet its own strength and the local strength requirements of the equipment;

- Lifting lugs shall have quality certification documents; the materials shall not have defects such as cracks, overlapped skin, interlayers;

- The location, quantity, orientation, elevation shall meet the requirements of lifting technical measures.

5.3.7.3 The connection welds between the lifting lugs and the equipment and the

connection welds between reinforcements shall be welded according to the welding process; the non-destructive testing shall be carried out according to the design requirements. The testing shall comply with the provisions of NB/T 47013.1 ~ 47013.13.

5.3.8 Spreader beam

5.3.8.1 Spreader beams shall be manufactured and used according to their design requirements.

5.3.10.3 The hydraulic lifting (jacking) jack and its component holder shall have firm and reliable support. After loading, the holder or the pressure plate bolts fixing the anchor block shall be tightened twice.

5.3.10.4 When lifting, the slide-out path of the steel strand wire harness shall adopt a rolling friction track. If blockage occurs, it shall be eliminated in time.

5.3.10.5 During the lifting process, if the steel strands are loose, it shall stop lifting, analyze the reasons, take adjustment measures.

6.1 General requirements

6.1.1 The organization that installs and uses mast cranes shall have corresponding qualifications issued by the competent government departments.

6.1.2 The mast shall have the following exit-factory technical documents.

- Design and manufacturing organization's qualification certificate;

- Mast manufacturing drawings, mast operating instructions, mast design calculations;

- Material certificate (including main materials, welding materials, accessories, etc.);

- Manufacturing process and quality inspection records;

- Load test records and load test certificate.

6.1.3 The foundation of the mast crane shall meet the foundation bearing capacity requirements in the lifting technical measures.

6.1.4 The mast crane shall be inspected and maintained before use.

6.1.5 After the mast is installed, a safety warning sign shall be installed on its top.

6.1.6 After the mast is installed, there shall be a reliable grounding device.

6.2 Installation (disassembly) of mast crane

6.2.1 A technical plan shall be prepared for the installation (disassembly) of the mast and implemented according to the technical plan.

6.2.2 A uniform wrench shall be used to tighten the mast connecting bolts. If necessary, a torque wrench shall be used; the mast connecting bolts shall be tightened symmetrically and in a certain order, to ensure a tight fit between the joint surfaces.

6.3 Movement of mast crane

6.3.1 The inclination in the direction of mast movement shall be less than 5°; the inclination amplitude should not exceed 5 m; the lateral inclination angle of the mast shall not be greater than 3°.

6.3.2 When the mast moves, at least four wind ropes shall be evenly distributed for controlling.

6.3.3 The road for mast movement shall be smooth and solid; foundation treatment shall be carried out if necessary.

6.3.4 When the mast movement route has a downhill slope or a turn, a tail slide device shall be installed and the movement shall be done intermittently.

6.3.5 Portal masts should be moved using the intermittent method and comply with the following requirements.

- A rigid connection is provided between the two lower legs of the portal mast;

- The forward inclination of the portal mast shall be less than 5°; the inclination amplitude should not exceed 5 m;

- The two bottom rows at the bottom shall move synchronously, with a relative deviation of not more than 100 mm.

6.4 Use of mast crane

6.4.1 The setting of wind ropes shall meet the following requirements.

- The number of wind ropes shall be determined according to the usage conditions.

Generally speaking, when a single mast is used, the number of wind ropes shall not be less than six; when there are double masts or multiple masts, the number of wind ropes on each mast should not be less than six; when a portal mast is used, the number of wind ropes for each portal mast shall be less than six;

- The angle between the wind rope and the ground is preferably 30°, which shall not be greater than 45° under special circumstances;

- When the mast's wind rope is clamped, the clear distance between the first rope clamp and the ground anchor pulley shall not be less than 4 times its pully diameter;

- The wind rope and its adjustment device shall have a safety margin and meet the

7.2 Installation of hydraulic lifting (jacking) gantry crane

7.2.1 Foundation treatment

7.2.1.1 Foundation treatment shall be carried out according to the lifting foundation treatment plan; the bearing capacity shall meet the lifting requirements.

7.2.1.2 The levelness of the mast foundation and the height difference between two

adjacent mast foundations shall be implemented according to the design documents.

7.2.1.3 During the foundation treatment process, there shall be a dedicated person responsible for quality monitoring and testing; construction records shall be kept.

7.2.2 Track installation

7.2.2.1 The installation of the track shall comply with the technical requirements for the installation of hydraulic lifting (jacking) gantry cranes.

7.2.2.2 The levelness and height difference of the track shall be implemented in accordance with the design documents.

7.2.3 Ground anchor setting

7.2.3.1 The ground anchor setting of hydraulic lifting (jacking) gantry crane shall comply with the provisions of 5.3.6.

7.2.3.2 The position, type, load-bearing capacity of the ground anchor of the hydraulic

lifting (jacking) gantry crane shall meet the requirements of the design documents.

7.2.4 Wind rope setting

7.2.4.1 The installation and use of wind ropes for hydraulic lifting (jacking) gantry

cranes shall comply with the requirements of the design documents.

7.2.4.2 The pretightening force of the wind rope shall meet the maximum design value requirements of the operating conditions.

7.2.5 Installation and debugging of hydraulic lifting (jacking) and automatic

control system

7.2.5.1 The number of steel strands inserted into each hydraulic jack shall be determined according to the load.

7.2.5.2 The angle between the load-bearing steel strand and the plumb line shall not be greater than 2°.

7.2.5.3 Before using the automatic control system, the parameters shall be set according to the product technical documents, the objects to be controlled, the control accuracy.

7.2.5.4 The control system shall be equipped with uninterruptible power supply facilities.

7.3 Use of hydraulic lifting (jacking) gantry crane

7.3.1 The use of hydraulic lifting (jacking) gantry cranes shall meet the requirements of the usage (operation and maintenance) instructions.

7.3.2 The use of hydraulic lifting (jacking) gantry cranes shall comply with the corresponding provisions of Chapter 9.

8.1 Selection of mobile cranes

8.1.1 The calculated load hoisted by a single crane shall be less than its rated load.

8.1.2 The crane shall select reasonable working conditions based on its performance.

8.1.3 When two cranes are used as main hoists, the lifting weight shall be reasonably distributed. The load of a single crane should not exceed 80% of its rated load. Balance measures shall be taken when necessary.

8.1.4 The safe distance between the boom and the external accessories of the equipment shall not be less than 500 mm.

8.1.5 The safe distance between cranes, equipment and surrounding facilities shall not be less than 500 mm.

8.1.6 When two or more cranes are used for lifting, the crane's boom length, working radius, lifting speed of the lifting pulley block, sling length should match.

8.1.7 The minimum height lifted by the crane shall maintain a safe distance of at least

200 mm between the bottom of the equipment and the top of the foundation or anchor bolts.

8.2 Use of mobile cranes

8.2.1 The outriggers of the truck crane shall be fully extended.

8.2.2 The foundation bearing capacity of the lifting standing position of the crane shall meet the usage requirements.

9.2.2 Before lifting, the lifting machinery shall be idling checked or tested; the braking device, guard device, safety protection device shall be confirmed to be normal before work can begin.

9.2.3 Before using the winch, the mechanical transmission and electrical control parts

shall be checked to ensure their normal performance. During the lifting process, electricians and fitters shall be on duty for maintenance; the power supply shall be cut off in time after the lifting is completed.

9.2.4 Rainproof measures shall be taken where the winch and power supply are placed.

9.2.5 A joint inspection shall be carried out before lifting. The items of the joint inspection mainly include.

- Technical briefing has been conducted;

- Worker personnel are familiar with their work content;

- The selection and arrangement of lifting machinery and lifting equipment are consistent with the plan;

- Technical disclosure records, machinery and rigging setup records, self-inspection records, mutual inspection records, concealed engineering records, other quality certification documents;

- The total weight of equipment lifting, installation of equipment accessories, settings of machinery and rigging;

- Equipment placement;

- Arrangement of spare tools and materials;

- Obstacles that hinder lifting work;

- The construction roads and sites determined in the lifting technical measures;

- Power supply capability;

- Participate in lifting personnel command signal drills;

- Weather forecast;

- Emergency plan;

- Other necessary inspections.

9.2.6 After the joint inspection of large lifting is completed, the inspectors shall sign the joint inspection record.

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