What is New in API 11th Ed - Download as PDF File .pdf), Text File .txt) or read online. API 11th Edition (New Items) - Download as Word Doc .doc /.docx), PDF File .pdf), Text File .txt) or read online. edition API / ISO centrifugal pumps. PumpWorks offers Current Edition: l API single stage end suction overhung type. OH2 pumps l API .
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ANSI/API STANDARD ELEVENTH EDITION, SEPTEMBER API publications necessarily address problems of a general nature. API Maxum. I 11th Edition Centrifugal Pump. November MANUFACTURER: CARVER PUMP COMPANY. PARK AVE. MUSCATINE, IOWA. ISO (Identical), Centrifugal pumps for petroleum, petrochemical and natural gas industries. ELEVENTH EDITION | SEPTEMBER | PAGES.
Statutory Requirements - The purchaser and the vendor shall mutually determine the measures necessary to comply with any governmental codes, regulations, ordinances, or rules that are applicable to the equipment, its packaging and preservation. Download pdf. Pointwise Approximation. Examples of services are mine dewatering and PTA chemical plant services. Nguyen Phuc Pham. An industry-leading hydraulic combinations to better match your process for Model on high-temperature service at a U.
NOTE added: For sealless pumps, reference can be made to API Std For heavy duty pump applications in industries other than petroleum, petrochemical and gas processing, reference can be made to ISO Allowable Operating Region Definition added - Portion of a pump's hydraulic coverage over which the pump is allowed to operate, based on vibration within the upper limit of this International Standard or temperature rise or other limitation, specified by the manufacturer.
Classically Stiff Definition added - Characterized by the first dry critical speed being above the pump's maximum continuous speed by the following: This term should be used only by the equipment manufacturer and not in the purchaser's specifications. I dentical Pump Definition added - Pump of the same size, hydraulic design, number of stages, rotational speed, clearances, type of shaft seal axial face or breakdown bushing , type of bearings, coupling mass, coupling overhang, and pumping the same liquid.
Maximum Operating Temperature Definition added —Highest temperature of the pumped liquid, including upset conditions, to which the pump is exposed. This temperature is specified to the seal vendor. Multistage Pump Definition added - Pump with three or more stages See 4. Similar Pump Definition added - Pump that is accepted, by agreement between purchaser and manufacturer as sufficiently similar to not require a lateral analysis, taking into account the factors listed for an identical pump 3.
Stage Definition added - One impeller and associated diffuser or volute and return channel, if required. Unit Responsibility - Unless otherwise specified, the pump vendor shall have unit responsibility. The pump vendor shall ensure that all sub-vendors comply with the requirements of this International Standard and all reference documents. Statutory Requirements - The purchaser and the vendor shall mutually determine the measures necessary to comply with any governmental codes, regulations, ordinances, or rules that are applicable to the equipment, its packaging and preservation.
Requirements - In case of conflict between this International Standard and the inquiry, the inquiry shall govern. At the time of the order, the order shall govern. In such cases, the expected flow limitations shall be indicated on the proposal curves see The vendor shall advise the type of bolting used on the pump.
The threads shall be Class 2 for bolting, studs and nuts. For other threads and nuts, they shall be Class 2 or 3. Threads shall be Class 6g for bolting and studs, and Class 6H for nuts. Pressure Casings - If the manufacture of cast pressure-casing parts requires the use of openings for core support, core removal or waterway inspection and cleaning, these openings shall be designed so they can be closed by welding, using an appropriate, qualified weld procedure, during the completion of casting manufacture.
Suction and Discharge Nozzles - To minimize nozzle loading and facilitate installation of piping, machined faces of pump flanges shall be parallel to the plane as shown on the general arrangement drawing within 0. Bolt holes or studs shall straddle centrelines parallel to the main axes of the pump. Auxiliary Connections -If specified, special threaded fittings for transitioning from the casing to tubing for seal flush piping may be used provided that a secondary sealing feature, such as O-rings, are used and that the joint does not depend on the thread contact alone to seal the fluid.
The connection boss shall have a machined face suitable for sealing contact. Auxiliary Connections Bulleted clause - If specified, piping shall be gusseted in two orthogonal planes to increase the rigidity of the piped connection, in accordance with the following stipulations. The long width of gussets made with bar shall be perpendicular to the pipe and shall be located to avoid interference with the flange bolting or any maintenance areas on the pump.
Mechanical Shaft Seals - Seal chambers shall be designed to provide for an additional flush port to approximately the centre of the chamber and extending vertically upward.
If specified, this port shall be drilled and machined for a piping connection. Tapered pipe thread connections are not allowed. Mechanical Shaft Seals - The vendor and purchaser shall agree on the maximum static and dynamic sealing pressures that can be anticipated to occur in the seal chamber and the vendor shall state these values on the data sheet [see 6.
Dynamics-Torsional Analysis - There are three general types of torsional analyses that are normally performed on pumps: A flow chart for the torsional analysis is shown in Figure Dynamics-Torsional Analysis Bulleted clause - If specified, for variable-frequency ASD's, a steady-state, damped-response analysis shall be performed. The analysis shall consider all resonant frequencies through 12 times line frequency. Most modern variable-frequency ASD's, when performing properly, produce insignificant torsional vibration and shaft stress.
Variable-frequency ASD malfunctions can produce significant excitation. Certain designs still exist that produce significant torsional pulsations. Dynamics-Torsional Analysis Bulleted clause - If specified, or if the driver is a synchronous motor rated kW hp or higher, a transient torsional analysis shall be performed. If performed, the time-transient analysis shall meet the requirements of 6.
Some purchasers choose to perform transient analysis if generator phase-to-phase or phase-to-ground faults are considered a significant risk or if rapid bus switching occurs on loss of power.
Dynamics-Torsional Analysis - Excitation of torsional natural frequencies can come from many sources, which might or might not be a function of running speed and should be considered in the analysis.
These sources can include but are not limited to the following: Dynamics-Torsional Analysis - Torsional natural frequencies at two or more times running speeds shall preferably be avoided in systems in which corresponding excitation frequencies occur or, if the natural frequency cannot be moved, shall be shown to have no adverse effect.
Dynamics-Torsional Analysis - In addition to the parameters used to perform the steady-state, undamped torsional analysis specified in 6. Dynamics-Torsional Analysis - The analysis shall generate the maximum torque as well as a torque vs. The maximum torques shall be used to evaluate the peak torque capability of coupling components, gearing and interference fits of components, such as coupling hubs. The torque vs.
Dynamics-Torsional Analysis - Appropriate fatigue properties and stress concentrations shall be used.
Dynamics-Torsional Analysis - An appropriate cumulative fatigue algorithm shall be used to develop a value for the safe number of starts. The purchaser and vendor shall mutually agree as to the safe number of starts. Values used depend on the analytical model used and the vendor's experience. Values of to starts are common.
This is a reasonable assumption for a motor since it does not add significant cost to the design. The driven equipment, however, would be over-designed to meet this requirement. A year life with 1 start per week equals starts. Equipment of this type normally starts once every few years rather than once per week. It is necessary, therefore, to specify a reasonable number of starts.
Bearing - Rolling-element bearing life basic rating life, L 10h , for each bearing or bearing pair shall be calculated in accordance with ISO and be equivalent to at least h with continuous operation at rated conditions, and at least h at maximum radial and axial loads and rated speed. NOTE 1: ISO defines basic rating life, L 10 , in units of millions of revolutions.
Industry practice is to convert this to hours and to refer to it as L 10h. NOTE 2: Bearing - Bearing system life the calculated life of the combined system of bearings in the pump shall be equivalent to at least h with continuous operation at rated conditions, and at least h at maximum radial and axial loads and rated speed.
The system life shall be calculated as given in Equation If specified, the bearing system life calculations shall be furnished. See Clause K. A bearing system L 10h life of h and h requires that the L 10h life of each individual bearing be significantly higher. Bearing Housings - For purge oil-mist lubrication, bearings and bearing housings shall meet the following requirements in a to d below.
Bearing lubrication is by a conventional oil bath, flinger or oil ring system. The oil shall be contained to prevent it from draining onto the baseplate. Bearing Housings - For both pure and purge mist applications, a drain connection shall be located on the bottom of the bearing housing to provide complete oil drainage see 6. Bearing Housings - Shielded or sealed bearings shall not be used in conjunction with either pure or purge oil-mist systems. Bearing Housings - The oil-mist supply, reclassifier s and drain fitting shall be provided by the purchaser.
Unless otherwise specified, directional reclassifiers, if required, shall be provided by the machine manufacturer. Bearing Housings - The purchaser shall specify whether synthetic oil shall be used. If specified, the purchaser shall specify the oil type. The vendor shall ensure that bearing-housing internal paint, if used, is compatible with the specified oil.
Materials - If reduced-hardness materials are specified in 6. Materials - If specified, reduced-hardness materials shall be supplied in accordance with ISO Materials - Bearing housings, load-carrying bearing housing covers and brackets between the pump casing or head and the bearing housings shall be steel except for pumps constructed in accordance with Table H.
Driver supports for vertical pumps that utilize thrust bearings in the driver to support the shaft shall be steel. Nameplates and Rotation Arrows - Nameplates and rotation arrows if attached shall be of austenitic stainless steel or of nickel-copper alloy Monel15 or its equivalent.
Attachment pins shall be of the same material as the nameplate or rotation arrow. Welding is not permitted as an attachment method. Couplings and Guards Bulleted clause - If specified, coupling guards shall be constructed of an agreed spark-resistant material see 6. Baseplates Bulleted clause - If specified, the baseplate shall be supplied without a deck plate, i. Auxiliary process liquid piping - Drain valves and a drain manifold shall be supplied, for pumps that require more than one drain connection.
The drain manifold shall be inside the drain pan limits. Drain valves are not required for pumps that can be drained with one drain connection. The vendor shall provide space on the baseplate for a purchaser-supplied drain valve inside the pump drain pan or drain rim. Auxiliary process liquid piping - Threaded piping joints may be used only on seal glands, instrumentation connections and for pumps of cast iron construction Class I-1 or I-2 in Table H.
Engineered Packaging with a wide range of drivers, seals, piping, nozzle configurations, flanges, baseplates and QC testing.
The unique capability of a RF flange. Provides positive sealing up to the maximum design pressure and temperature. Provision for instrumentation mounting per API available. Examples of services are mine dewatering and PTA chemical plant services. The single stage Model has interchangeable parts with Model Connections for pure or purge oil mist lubrication can be provided for immediate use or future requirements.
Heat Flinger Heat flinger dissipates shaft- Sealed Power End conducted heat and circulates Designed with magnetic end face air to reduce heat buildup. Provided for seal systems with auxiliary components to Corrosion-resistant material.
Heavy-Duty Pedestal Unique trapezoidal design provides superior resistance to deflections from flange loads. Top Suction Nozzle This option reduces space requirements and installation costs for unique applications.
Coke-Crusher Option Allows coke particles to be easily pumped by crushing coke Inducer Option with a cutter screw. Minimizes radial load and reduces shaft deflection for increased mechancial seal life. Front and rear rings control seal chamber flows and pressures. Optional non-metallic rings for improved efficiency. Wear rings not utilized in LF pumps. Balanced to stringent ISO Grade 1. All joints are continuously welded. Extra-width sizes available to ease maintenance of seal systems.
Minimizes shaft deflection, maximizes bearing and mechanical seal life. Made from non- sparking metal. Large oil sump capacity. Cast fins enhance cooling. Renewable throat bushing standard for controlled seal chamber environment. Your local PRO Services Center offers solutions for lowering total cost of ownership of your pumping systems. This can be achieved by upgrading your older-style API process Benefits: Years of experience allow PRO Services Centers to easily The question of whether to replace or upgrade existing handle any rotating equipment, including pumps, drivers, equipment is a challenge faced by most end users today.
When casing, piping and foundation are in good shape, upgrading your existing pump to comply with current API standards usually is more economical than new pump installation.