TABLE OF CONTENTS Vinod Patel
Trygve Dahl
After the initial decision that pumping equipment is required, purchasing of the equipment can be divided into the following general steps.
Engineering of the pumping system
Selection of the pump and driver type
Pump specification and data sheet preparation
Inquiry and quotation
Evaluation of bids and negotiation
Purchase of the selected pump and driver
In the process of specifying pumping equipment, the engineer must determine system requirements and system head curves, select pump type, write the pump specification, complete the pump data sheet, determine testing, inspection and vendor drawing and data submittal requirements and develop all the data necessary to define the required equipment from the supplier.
Having completed this phase of work, the engineer is then ready to take the steps necessary to purchase the equipment. These steps include issuing the pump inquiry to the bidders, technical and commercial evaluation of pump bids, selection of the supplier, and release of data necessary to issue the purchase order. The ultimate result of this process is the selection of a pump/driver combination that satisfies both the process and mechanical requirements.
The first step is to define the requirements and conditions under which the equipment will operate.
Fluid Type A thorough description of the fluid to be handled must be developed. This includes properties such as viscosity, density, vapor pressure, corrosiveness, erosiveness, volatility, flammability, and toxicity. Depending on the process and...
