A few small issues regarding equipment installation?

Regarding lubricant and grouting issues, unless specifically stated in the contract, they are generally the owner’s responsibility.

In response to this fellow sea traveler’s question, I’m offering my initial thoughts as a starting point; please forgive me if there are any mistakes in my answer. 1. Rotating the drive equipment is usually done during the individual machine testing; there’s no need to set aside separate time for this purpose. 2. Lubricants are generally provided uniformly by the project owner; to be more precise, they should be prepared in the production workshop of the facility under construction. 3. I have encountered this issue before. General foundation design drawings will indicate the thickness of the secondary grouting layer, but they do not specify what type of base the pump will have; grouting within the base helps to prevent vibration in the pump. At that time, the design institute was asked to issue a design change to fill the base completely, so that it would be possible to settle the account with the client.

Reply to 1# xueshan7815: 1. The rotation of moving equipment’s shafts is usually carried out as part of the preparatory work before testing; there are no strict regulations regarding this in the standards. It is a protective measure aimed at pre-operating the bearings in order to check their installation condition. 2. The lubricant for equipment, especially moving equipment, is generally provided by the production workshop – that is, by the owner – and it is included in the production preparation costs. 3. For the pump base, especially those made of structures such as channel steel, it is not necessary to fill this area completely during secondary grouting; this can be determined according to the owner’s requirements. However, this aspect is not included in the design. If the owner requires it to be filled, a warranty can be issued to the construction party

A project is currently underway, and all of the above issues are relevant to it. My understanding is as follows: 1. Turning the rotor of a rotating machine is not merely done to check for any issues with the bearings. In large rotating machines, the rotor shafts are long and heavy; to prevent deformation over time, it is necessary to turn the rotor. Our practice is to do this once a week, turning it several times, with the goal of ending up at an angle of 180 degrees relative to its original position. This requires lubricating the bearings during installation to prevent dry friction. The uninstalled rotor also needs to be turned on the bracket, using the same method as above ； 2. The lubricant for the equipment can be provided by the owner; this depends mainly on the terms of the contract. Generally, it is the production preparation team that is responsible for planning and organizing the procurement of such lubricant. 3. The grouting of the equipment base should fill it completely, which helps to prevent vibration of the pump; the cost for this can be covered through an on-site invoice.

For the grouting areas that go beyond the drawings, a change order must be issued, and construction shall be carried out in accordance with the contents of that change order.

Everyone has answered the first two questions; that’s basically how it’s done. Regarding the third question, for small pump units, you can embed the anchor bolts according to the equipment drawings, or use secondary grouting as an alternative. For large units, it is recommended to use secondary grouting. In addition, for those units that experience significant vibration, structural elements such as rebar can be welded to the equipment base, followed by secondary pouring on top; this approach helps to effectively reduce vibration while also enhancing the aesthetic appearance.

For newly installed units, given the long installation period, is it the construction party that is responsible for turning the rotating equipment? How are the fees calculated?

For some tasks, it depends on whether an agreement has been reached between the developer and the contractor; if no such agreement exists, negotiations can still take place. Additionally, generally by the time of equipment installation, the personnel from the owner’s project team are already in place, and one can also get involved in the management process – this is part of the daily work required to get things underway