API 610 OH6 Integrally Geared Vertical High Speed Centrifugal Pump 316 SS
API 610 OH6 Integrally Geared Pump
,Vertical High Speed Centrifugal Pump
,316 SS Process Pump OH6
Product Description
Drawing on over 15 years of specialized manufacturing experience in integrally geared rotating equipment, our engineering team has developed this API 610 OH6 vertical high speed centrifugal pump through iterative computational fluid dynamics analysis validated against physical performance data collected from more than 200 field installations across 18 countries.
Each pump is machined, assembled, and tested within our ISO 9001:2015 certified 12,000-square-meter production facility, where precision five-axis CNC machining centers maintain impeller vane profile tolerances within ±0.025 mm and gear tooth geometry to AGMA Class 12 standards. The OH6 integrally geared configuration represents a proven design philosophy refined through direct collaboration with reliability engineers from major petrochemical operators in the Middle East, Southeast Asia, and North America.
The pump's pressure-retaining casing undergoes mandatory hydrostatic testing at 1.5 times the maximum allowable working pressure in accordance with API 610 Clause 8.3.3, witnessed by our quality assurance engineers and documented with time-stamped pressure decay curves. Every impeller assembly is dynamically balanced on a Schenck horizontal balancing machine to ISO 1940 G1.0 precision grade—a specification point verified during our API Q1 surveillance audits.
| Parameter | Specification | Verification Method |
|---|---|---|
| Design Compliance | API 610 12th Edition, OH6 Category | Design review per API 610 Annex A |
| Maximum Flow Rate | 85 m³/h (375 GPM) at 60 Hz | Calibrated magnetic flow meter, ±0.5% accuracy |
| Maximum Differential Head | 914 m (3,000 ft) | Calibrated pressure transmitters, suction & discharge |
| Maximum Allowable Working Pressure | 10.0 MPa (1,440 psi) at 38°C | Hydrostatic test at 15.0 MPa per API 610 |
| Rated Speed (Gearbox Output) | Up to 9,200 RPM (application-specific) | Stroboscopic tachometer verification |
| Materials of Construction | 316 SS / Duplex 2205 / Hastelloy C-276 | PMI verified per API 610 Clause 6.12 |
| Gearbox Lubrication | Integrated pump with duplex filter, air-cooled HX | ISO 4406 Class 17/15/12 oil cleanliness |
| Shaft Sealing System | API 682 4th Ed. Cartridge Single/Double/Tandem | Air test at 1.0 bar(g) per API 682 |
| Nozzle Flange Rating | ANSI B16.5 Class 300/600 RF & RTJ | Dimensional inspection per ANSI B16.5 |
| Maximum Viscosity | 750 cP (with performance correction) | HI Standard 9.6.7 viscosity correction method |
| Solids Handling Capability | Up to 400 microns (0.015 inch) | Open impeller with hardened wear surfaces |
- Precision Manufacturing Infrastructure: All impeller investment castings are produced using the lost-wax process in our dedicated foundry with spectrometric chemical analysis of every heat. Gear tooth profiles are finish-ground on Reishauer continuous generating grinding machines, with 100% gear tooth contact pattern verification using prussian blue transfer before gearbox assembly closure.
- Performance String Testing Protocol: Every completed pump assembly undergoes a full-string performance test on our API 610-compliant closed-loop test bed using ISO Grade 2 calibration instrumentation. The test protocol includes five-point head-capacity curve verification, NPSHr determination via 3% head drop method, mechanical running test at rated speed for a minimum of 4 hours, and bearing housing vibration measurement per API 610 Table 16 limits.
- Non-Destructive Examination Program: All pressure-retaining castings receive 100% visual examination (VT), liquid penetrant examination (PT) per ASME Section V Article 6, and ultrasonic examination (UT) per ASME Section V Article 5 for wall thickness verification at critical sections identified by finite element stress analysis.
- Material Traceability System: Each pressure-containing component carries a unique heat number traceable to the original mill test certificate (EN 10204 Type 3.1), with positive material identification performed on all alloy steel and stainless steel components using handheld X-ray fluorescence analyzers calibrated daily against certified reference standards.
Based on our systematic approach refined through thousands of factory acceptance tests, every integrally geared high speed centrifugal pump undergoes a documented full-string performance test on our closed-loop test facility. The test stand is equipped with ISO 17025-calibrated instrumentation including a magnetic flow meter for flow measurement, deadweight-tested pressure transmitters for head determination, and a precision torque meter for power measurement. We plot the actual head-capacity-efficiency curve at five operating points and compare against the guaranteed performance curve. The mechanical running test at rated speed continues for a minimum of 4 continuous hours with bearing housing vibration measurements taken at 30-minute intervals per API 610 Table 16 criteria. The complete test report, including raw data, calibration certificates, and vibration spectra, is compiled into the final documentation package delivered with the pump.
We understand that process industry end-users require comprehensive technical documentation to satisfy OSHA 1910.119 PSM, COMAH, and equivalent regulatory frameworks. Each pump ships with a quality dossier containing: certified Material Test Reports (EN 10204 Type 3.1) for all pressure-retaining components with chemical composition and mechanical properties; NDT reports (VT, PT, UT, PMI) for each pressure casing; hydrostatic test certificates with pressure-time charts; ISO 1940 G1.0 dynamic balancing reports for the impeller and gear assemblies; API 682 seal qualification documents including seal chamber dimensions and flush plan schematic; witnessed performance test curves; and a comprehensive installation, operation, and maintenance manual with exploded assembly drawings and bill of materials.
We have manufactured and delivered over 500 integrally geared OH6 pump units since 2010, accumulating more than 2 million cumulative operating hours across chemical, petrochemical, and refinery installations. Our pumps are currently operating in facilities owned by national oil companies and independent refiners in the Middle East, Southeast Asia, South America, and Africa. Subject to client confidentiality agreements, we can arrange reference site visits or provide documented case studies demonstrating long-term reliability performance, including units that have exceeded 50,000 operating hours without major overhaul. Our standard warranty covers 18 months from shipment or 12 months from commissioning, whichever occurs later.
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