Regarding the procurement of general equipment, the process of requesting quotes and making purchases, the documents required for that purpose, and the documents needed to purchase an ordinary container

1. If purchasing a demineralized water tank, what parameters are required: size, wall thickness, material, weight? What else is needed? If a design institute is involved in the design, the quotation request submitted by that institute is generally used as a reference, covering information such as the main media and materials, assembly drawings, manufacturing requirements, and approximate weight. In which file are these parameters specified? Is it the inquiry document? In which document was wall thickness first mentioned? The wall thickness is generally specified in the inquiry document; otherwise, it cannot be considered an inquiry document, as without wall thickness there is no weight, and without weight, it is impossible to request a quote. 2. The data included in a general process package consist of design pressure, temperature, and tank volume information; material and wall thickness details are not provided. A process package refers to a set of data based on the process principles along with brief information on the main equipment. The basic dimensions of the equipment are determined based on requirements such as flow rates and catalyst loading amounts required by the process, while details like wall thickness and material are usually not specified. These aspects need to be designed by the engineering firm specializing in equipment design, taking into account the process conditions. 3. In the preliminary design, based on the data provided in the process package, the materials and weights are determined, and a table of container specifications is prepared. However, the wall thickness is rarely specified in this table. The wall thickness is usually determined by the equipment design team, who take into account the process conditions provided by the process engineering team as well as various container standards; this value generally represents the final wall thickness, with little change. The container data table, which details the equipment specifications, is part of the preliminary design documents; it does not yet include detailed design information, so the wall thickness is not specified. 4. The thickness data is included in the inquiry document issued by the design institute; how is this parameter determined? What calculations are needed? What is it called, **pressure calculation? It is calculated based on process conditions, taking into account factors such as corrosion margin, pressure, temperature, and the medium used; I’m not familiar with the specific calculation methods. 5. According to the inquiry document (MR), a technical agreement is to be signed; what parameters need to be specified in this technical agreement? Corrosion allowance and service life? A technical agreement generally specifies technical requirements such as the standards for the flanges at the equipment connections, the weight of the equipment, the materials used (the materials for various components), the manufacturing methods, and whether heat treatment is required. If the client does not have personnel with expertise in related fields, it is advisable to have designers involved in reviewing this agreement, as this can be very helpful for the subsequent design of the equipment. 6. Under normal procedures: bidding is carried out in accordance with the technical specifications; once a bidder is selected, manufacturing drawings are prepared, and then production takes place using those drawings. What are the differences between the manufacturing drawings and the drawings in the MR files? The manufacturing drawing is a document at the level of construction drawing design; it represents the final construction drawings prepared by the equipment specialists after integrating information from process and instrumentation fields. In other words, it is the blueprint for equipment manufacturing. This drawing includes additional key parameters compared to those in the quotation document, but it remains consistent with most of the content in the quotation document. Moreover, the equipment manufacturing blueprint also contains drawings for the fabrication of individual components, which are generally not included in the quotation document. 7. Finally, there is a blueprint to be provided as part of the delivery documents. What are the differences between a blueprint and a manufacturing drawing? The blueprint is the final drawing for equipment manufacturing; it is a diagram prepared by the equipment manufacturer based on the design blueprint, and after passing inspections by local authorities such as inspection agencies, it becomes the drawing used for actual equipment production. This blueprint is provided by the design institute, and after being handed over to the manufacturer, it returns to that institute. 8. If, in accordance with the framework agreement, bidding is carried out first based on that agreement, and then, using the data provided in the basic design, no MR document is issued instead the equipment manufacturer directly produces the manufacturing drawings for confirmation by the design institute, what aspects does the design institute need to verify? (Dimensions, material type, wall thickness, location of openings, foundation requirements, heat treatment specifications, etc.) The design institute generally provides conditional drawings, which show the equipment that meets the basic requirements; the manufacturer then needs to carry out a comprehensive design taking into account factors such as the materials used, operating temperature and pressure, levels of corrosion, and seismic resistance. In essence, it can be said that the equipment design work originally done by the design institute is now carried out by the equipment manufacturer, and even small-scale equipment manufacturers usually entrust design institutes to handle the design work. 9. What parameters are required and what are the guaranteed values when signing a framework agreement for container procurement? Unless it is a large-scale purchase, manufacturers will only sign such a framework agreement with you; the client needs to provide a request for quotes or design specifications. The guaranteed values are the price and delivery time! (My personal understanding)