Thread Content
Please share this material; it is very useful as a reference for everyone’s orders! Technical Specifications for Pumps – Reciprocating Pump Technical Specifications 1.1 Scope These technical specifications establish the minimum requirements for reciprocating pumps used in industrial installations, as well as their drives and auxiliary equipment. They also cover aspects such as the performance, design, structure of reciprocating pumps, their drives, testing and marking, packaging, and procurement. 2 Referenced standards, specifications, and regulations 2.1 In addition to the technical specifications outlined in this document, the standards specified on the pump data sheet (latest version) GB 9234 – Technical requirements for reciprocating pumps shall also be complied with ； JBl053 Technical Specifications for Steam Reciprocating Pumps ； GB 7784 Test methods for reciprocating pumps ； GB9235 Test methods for steam reciprocating pumps ； API674 Reciprocating Pumps 2.2 In the event of any conflict between these engineering specifications and the following standards, these engineering specifications shall take precedence ； In case of any discrepancy with the order contract, the purchase order and the pump data sheet shall prevail. At the same time, the seller shall clarify the discrepancies to the buyer in writing, so as to alert the buyer and facilitate resolution. 3 General Provisions 3.1 Unless otherwise specified, pumps, drives, and their auxiliary equipment shall be suitable for outdoor starting and continuous operation at the specified minimum and maximum ambient temperatures. The continuous operation cycle should be no less than 8,000 hours. 3.2 Untested prototypes cannot be accepted; only pumps that have been verified through actual production can be accepted. Production verification refers to the pump having at least two years of experience in safe operation under similar operating conditions. 3.3 Unless otherwise specified, the seller shall supply the entire pump unit, including the pump, coupling, drive motor, and all auxiliary equipment, and ensure the quality of the entire pump unit. 3.4 Unless otherwise specified, pumps, including the drive motor, couplings and guards, as well as auxiliary equipment, shall be installed on the same base. 3.5 The rated flow rate of the reciprocating pump shall be at least 110% of the maximum (operational) flow rate specified by the user. 3.6 The rated power of the motor shall be at least K times the maximum shaft power of the reciprocating pump (including power losses in the gearbox and coupling). The value of K is as follows: Maximum shaft power P, in KW: K = 125% when Pa ≤ 19; K = 115% when 19 ≤ Pa < 56; K = 110% when Pa > 56. 3.7 The effective net positive suction head available NPsHa and the required net positive suction head NPsHr shall use the same reference level. When the difference between NPsHa and NPsHr is less than or equal to 0.6 m, a cavitation margin test should be conducted. 4. Structural Design 4.1 Pressure-bearing Parts 4.1.1 The maximum allowable outlet pressure of the pump shall be at least 110% of the pump’s rated outlet pressure. 4.1.2 All pressure-bearing parts (including areas affected by inlet pressure) shall be designed for the maximum allowable outlet pressure of the pump. The stress value obtained: for domestically produced pumps, it should not exceed the maximum allowable stress value specified in HG20531—93 (cast iron and cast steel vessels) ； For imports, it should not exceed the maximum allowable stress value specified in Section VIII of AsME. 4.2 Interfaces 4.2.1 Unless otherwise specified, all interfaces shall be flanged connections. 4.2.2 Unless otherwise specified, the inlet and outlet connection flanges of domestically produced pumps shall comply with the requirements of GB 9112, while those of imported pumps shall comply with the requirements of ANSI B16.1 and 16.5. Flanges with a diameter or thickness greater than the above standards can also be used. 4.2.3 Unless otherwise specified, import and export flanges shall have the same pressure rating. 4.3 Hydraulic end components 4.3.1 Cylinder block The cylinder block must be equipped with a lining. 4.3.2 Piston or plunger 4.3.2.1 The surface of the piston rod or plunger section in contact with the packing shall be hardened and polished. 4.3.2.2 Unless otherwise specified, hollow pistons or plungers shall not be used. 4.4 Packing Box 4.4.1 The packing box shall be equipped with a packing ring to allow for the flushing or lubrication of the packing. 4.4.2 When the temperature of the conveying medium is above 80°C or the vaporization pressure is above 0.098 MPa(G), 4.5 Couplings: Unless otherwise specified, flexible couplings shall be used. 4.6 Buffers: If specified in the data sheet, the inlet and outlet buffers shall be provided by the seller. 4.7 Safety valves: 4.7.1 If specified in the data sheet, the safety valves shall be provided by the seller. 4.7.2 Unless otherwise specified, the inlet and outlet of the safety valve shall be flanges. 4.7.3 The set pressure of the safety valve shall be at least the greater of 110% of the rated pressure and 0.049 MPa(G). 4.8 Bearings: The bearings shall be of standard type; custom-made bearings developed by the manufacturer are not permitted. 4.9 Lubrication System 4.9.1 Unless otherwise specified, reciprocating pumps shall be lubricated with a thin lubricant. 4.9.2 Pumps lubricated with pressure-free oil shall be equipped with fixed oil level indicators. 4.9.3 For pumps equipped with a pressure oil system, such system shall be installed on the pump base and shall include the following: 4.9.3.1 An oil tank with a level indicator. 4.9.3.2 Main oil pump and auxiliary oil pump. 4.9.3.3 2 oil filters operating in parallel. 4.9.3.4 2 oil coolers operating in parallel. 4.9.3.5 Fuel pressure gauge and thermometer. 4.9.3.6 Bearing or return oil thermometer. 4.9.3.7 Pressure joints. Signal for low oil pressure and start the auxiliary oil pump; trip in case of low oil pressure. 4.10 Auxiliary pipelines 4.10.1 Pipelines required for lubrication, cooling, and seal flushing, etc. The seller shall provide it and install it on the pump and/or base. 4.10.2 Unless otherwise specified, the pipes in all piping systems shall be not less than 3/8 inch, and the fittings shall be not less than 1/2 inch (15 mm). 4.10.3 Except as specified for males, fittings of 1 1/4 inches (32 mm), 3 1/2 inches (90 mm), 7 inches (175 mm), and 9 inches (225 mm) shall not be used. 5. Materials 5.1 The materials shall be specified by the buyer and entered in the pump data sheet. If the seller believes that other materials are more suitable, they must obtain the buyer’s confirmation before using them. 5.2 Unless otherwise specified, the corrosion margin for carbon steel and low-alloy steel is 3 mm, while it is 0 mm for high-alloy steel. 5.3 The use of materials containing asbestos fibers is strictly prohibited. 5.4 Rubber materials are strictly prohibited when transporting organic solvents. 5.5 Cast iron materials cannot be used for pressure parts that transport flammable, explosive, or toxic media. 5.6 Except for austenitic stainless steels, when the medium or ambient temperature is below -20°C, the seller shall conduct V-notch impact tests on the weld joints of the base metal phase. 6 Workshop Testing 6.1 The test items are listed in the pump data sheet. 6.2 The hydrostatic test pressure shall be 1.5 times the maximum allowable operating pressure, but not less than 0.14 MPa(G). 6.3 The performance tolerance for the shop tests is specified in the table below. Performance specifications: Reciprocating pump, Steam reciprocating pump. Rated flow: +3% to -0%; +3% to -0%. Rated power: +4% – ----- NPSHr: +0% +0%. For those inspection or testing tasks that the buyer is required to be present for according to the regulations, the seller shall notify the buyer at least 20 days in advance so that the buyer can attend in a timely manner. 6.5 The results of the non-observation tests shall be recorded and submitted for the buyer’s approval. 7. Painting, Marking, Packaging 7.1 Painting 7.1.1 All dust, rust, oil stains, and other contaminants must be removed before painting. 7.1.2 The equipment topcoat shall meet the buyer’s requirements. 7.2 Markings 7.2.1 The nameplate of the pump shall be made of 18–8 stainless steel and firmly fixed in a prominent position on the unit. 7.2.2 The content of the nameplate shall include: tag number ； Device name/Unit name ； Name and trademark of the seller (manufacturer) ； The model and name of the pump, as well as its main parameters, including rated flow rate (m3/h), maximum allowable outlet pressure (MPa(G)), safety valve setting pressure (MPa(G)), shaft power (kw), and pump weight (kg), etc ； The pump’s factory serial number and date. 7.2.3 The inlet and outlet of the pump shall be equipped with metal sealing plates, along with rubber gaskets and at least four bolts. 7.2.3.1 The packaging of the pump (including the drive unit and auxiliary equipment) shall ensure that the product is not damaged or lost during transportation; it shall be suitable for outdoor placement and capable of withstanding exposure to the elements for a period of at least six months. 8 Documents and drawings 8.1 Seller’s quotation documents The seller’s quotation documents shall include the following: 8.1.1 A completed seller’s data sheet based on the data sheet provided by the buyer; 8.1.2 Preliminary dimensional drawings and piping layout diagrams. 8.1.3 Requirements for utilities such as water, electricity, and steam. 8.1.4 Typical cross-section of the pump. 8.1.5 Recommended list of spare parts. 8.1.6 Ensure that the specific instructions in this manual are strictly followed for the pump unit. If the pump unit does not strictly comply with this manual, the seller shall provide a detailed list explaining each discrepancy. 8.2 Contract Documents 8.2.1 The seller must provide the documents in terms of timing, type, and quantity as specified in the purchase order, and send them to the address indicated in the order. 8.2.2 The following information should be indicated on each page of the document: Purchaser (user) company name ； Project number ； Purchase order number or document number ； Pump ID ； Any other notation specified on the purchase order. 8.2.3 The seller shall provide at least the following documents: List of document catalog ； Pump data sheet (for manufacturing) ； Dimensions and layout depend on (including basic data, the location, size, and pressure rating of the main inlet and outlet connections, the location of the motor junction box, as well as the allowable external forces and torques on the inlet and outlet pipes) ； Auxiliary piping layout diagram and connection list (can also be shown on the dimensional drawing) ； Pump cross-section diagram and parts list including material names of relevant components ； Axial seal sectional view and parts list including material names of related components ； Spare parts list ； List of lubricants and hydraulic fluids ； Auxiliary Equipment Data Sheet (if required) ； Installation, maintenance, and operation manuals. 8.2.4 If the buyer requests it, the seller shall also provide the buyer with: material test reports, the requested inspection reports, factory test records, and other important inspection reports.