Jiangsu Haifa Machinery Manufacturing Co., Ltd.

AbstractTo meet the demand for high-parameter fluid equipment in the refining, petrochemical, coal chemical, power generation, solar thermal energy storage, and offshore engineering sectors, Jiangsu Haifa Machinery Manufacturing Co., Ltd has initiated the construction of Taizhou High-Temperature and High-Pressure Pump Engineering Research. The research center will systematic research on hydraulic design of high-temperature and high-pressure pumps, insulation and mechanical seals, thermal expansion compensation of the pump casing, rotor dynamics, and intelligent monitoring. The focus will be on solving problems such as material strength degradation, casing thermal deformation, shaft system misalignment, seal face instability, the difficulty of predicting operating conditions in advance during the transport of high-temperature.Quick ConclusionEstablishing this engineering research center is not simply about adding a few sets of design software test equipment. Our goal is to build a complete technical chain from工况 analysis, material verification, CFD calculation, finite element analysis, prototype manufacturing, performance testing, to on-site data feedback. The research results from the center will be prioritized for application in Jiangsu Haifa's API 610 OH2, BB2, BB4, and BB5 high-temperature and high-pressure chemical pumps forming an engineering design system that calculable, testable, and traceable.I. Conducting Fundamental Technical Research for High-Temperature and-Pressure ConditionsIn actual projects, high and high pressure are often by flammability, easy crystallization, strong corrosiveness, or high inlet pressure. Simply increasing the pump casing wall thickness cannot solve all problems; hydraulic loads, thermal stresses, nozzle loads, rotor deflection, and the mechanical seal operating window must also be considered simultaneously. The research center will employ Computational Fluid Dynamics (D) to analyze the internal flow field of impellers, volutes, and diffusers, optimizing for low-flow recirculation, impeller outlet pressure pulsation, Net Positive Suction Head (NPSH), and axial force variations. Finite Element Analysis (F) will be used to the stress distribution of the pump casing, cover, bearing housing, and pressure-containing connections under hot conditions. In terms of materials research, materials such as WCB, WC6, WC9 CF8M, 316L, duplex steel, and nickel-based alloys will be in a graded manner based on the medium composition, design temperature, and chloride ion content. Material certificates, heat treatment records, non-destructive testing reports, and pressure test data will be into quality archives.II. Researching Collaborative Technologies for Insulation, Cooling, and Mechanical SealsLeakage in high-temperature is often not due to the failure of a single seal component, but the lack of a stable balance among pump cavity temperature, seal chamber pressure, flush fluid temperature, and face load. We will establish a high seal test unit within the engineering research center to study insulation jackets, cooling water jackets, heat dissipation chambers, thermal barriers, and bearing housing insulation structures. on whether the medium is prone coking, crystallization, or is toxic, auxiliary systems such as API Plan 21, Plan 23, 32, Plan 52, Plan 53A, and Plan 54 will be configured. Research priorities include: controlling the safety margin between seal chamber temperature and medium vaporization pressure; the specific seal face pressure, spring load, and compensating ring clearance; reducing the heat transferred from the high-temperature medium along the shaft to the bearing housing preventing issues like insufficient flush pressure, backflow, and uneven wear of the seal faces; and establishing test records for mechanical seal leakage rate, temperature rise, and operating time.III Solving Pump Casing Thermal Expansion Shaft System Mis IssuesAfter a high-temperature pump heats up from a cold state to its temperature, the pump casing, baseplate, pump shaft, and piping undergo varying degrees of thermal displacement. Improper handling of support structures or installation benchmarks can easily lead to coupling misalignment, wear of wear rings, increased bearing loads, and tilting of the seal faces. The research center will focus on Thermal Growth calculations and Hot Alignment Offset compensation studies. For high-temperature OH2, BB2, and BB pumps, centerline, guide keys, sliding supports, and thermally symmetric structures will be to allow the pump casing expansion to be released along a predetermined direction. Simultaneous checks during the design phase will include:

| Research Project | Main Control Content | Expected Effect |
| :--- | :--- | :--- |
| Pump Casing Stress | Temperature gradient, wall thickness variation, flange connections | Reduce local stress concentration |
| Rotor Thermal Elongation | Thermal expansion of pump shaft, impeller, shaft sleeve | Prevent rotor-to-stationary part contact |
| Cold Pre-Offset | Cold alignment compensation value for pump and motor | Ensure coaxial alignment during hot operation |
| Nozzle Loads | Forces and moments on suction and discharge flanges | Reduce impact of external piping on pump casing deformation |
| Running Clearances | Clearances for wear rings, balance drum, shaft sleeves | Balance efficiency with thermal safety margin |

IV. Building Intelligent Monitoring and Predictive Maintenance SystemsTraditional inspections typically only detect anomalies that have already occurred. The engineering research center will integrate signals for vibration, bearing temperature, seal pressure, lubricating oil condition, suction pressure, discharge pressure and flow rate into a condition monitoring platform, establishing an operating database for high-temperature and high-pressure pumps. Through Condition Monitoring and Predictive, early characteristics such as unbalance, misalignment, cavitation, bearing wear, abnormal seal flush, and deviation from the minimum continuous stable flow can be. For critical units, the following monitoring interfaces can reserved:

| Monitoring Item | Collection Location | Main Judgment Content |
| :--- |--- | :--- |
| Vibration Velocity & Spectrum | Drive end, non-drive end bearing housing | Un, misalignment, looseness, cavitation| Bearing Temperature | bearing, thrust bearing | Lubrication abnormality, change |
| Seal Pressure & Temperature | Mechanical seal chamber, flush piping | Flush failure, medium backflow, vaporization risk |
|ction Pressure | Pump suction nozzle | NPSH Margin |
| Flow Rate & Discharge Pressure Pump discharge piping | Deviation from Best Efficiency Point, system fluctuation |
| Lubating Oil Condition | Bearing housing or oil console | Oil temperature, level, contamination degree |

V. Technical Parameters of Jiangsuifa API 610 High-Temperature and High-Pressure PumpsThe following data represents the coverage range of series publicly available on the Jiangsu Haifa website. Actual model selection requires one-to-one matching based on medium density, viscosity,ization pressure, NPSHa, corrosiveness, and operating mode.

| Product Series API Structure | Flow | Head Range | Applicable Temp. | Design Pressure | Application |
| : | :--- | :--- :--- | :--- | :--- | :---| HES OH2 High-Temp/High-Pressure Process Pump |2 Single-stage, Overhung | 2～2600 m³/h Up to 300 m -80～450 ℃ | 2.5～45 MPa | High-temp oil, coal chemical media, chemical fiber, refining process |
| BA Series Flow Process Pump | BB2 Radially Split, Between-Bearing | Up to 4000³/h | Up 350 m | -40～450 ℃ | 5.0 MPa, up to 10.0 for special design | Large hot oil, circulating water, crude oil, chemical media |
| HCS Horizontal Multistage Pump | BB4 Radially Split,istage | Up to  m³/h | Up 1000 m -80～180 ℃ | to 15 MPa |iler feed water, unit boosting, industrial high-pressure transport |
| HCSZ Single Casing High-Pressure Pump | BB5 Horizontal Multistage | 5～730 m³ | Up to 2800 m | -80210 ℃ | Max 30 MPa | High-pressure water injection, decoking, ash water, RO boosting |
| HDSZ Double Casing-Pressure Pump | BB5 Double Casing, Multistage | 5～ m³/h | Up 3400 m |80～450 ℃ | 35 MPa |ation feed, aromatics circulation, high-temp/high-pressure |

Parameters compiled from the OH2, BB2, BB4, BB5 product pages the Jiangsu Haifa official website.

VI. Extending from Design Calculation to TestThe research center plans to build testing capabilities for hydraulic performance, cavitation, vibration, pressure containment, hot operation, and mechanical seals. For every high-parameter pump it is necessary not only to generate performance curves but also to retain design calculations, material traceability documents, rotor balancing records, non-destructive testing reports and factory acceptance test data. We will focus on verifying performance under rated conditions, minimum continuous stable flow, flow, hot start-up, shutdown backflow, and abnormal conditions. This ensures that research results can be translated into executable selection schemes for the field, rather than remaining as theoretical models. API610 12th Edition specifies requirements for centrifugal pumps for petroleum, petrochemical, and natural gas industries; ISO 13709 covers overhung, between-bearing, and vertically suspended centrifugal pumps. The engineering research center will conduct design verification based on these international technical systems, combined with API 682 shaft sealing systems, ISO 9906 hydraulic performance acceptance, and relevant domestic pump product standards.VII. Driving Engineering Achievements in High-End Special Pump TechnologyAfter the completion of the Taizhou High-Temperature and High-Pressure Pump Engineering Research Center, Jiangsu Haifa will further streamline the R&D pathway of "Operating Condition Database → Hydraulic Model → Structural Calculation → Material Research → Prototype Testing → Field Verification." For us, the value of the R&D center lies not in its name, but in its ability to truly solve user field problems related to temperature rise, vibration, leakage, cavitation, coking, and operating efficiency. We hope that through continuous accumulation of test data and project experience, we can improve the efficiency stability, and maintainability of API 610 chemical process pumps under complex conditions, providing more reliable high-temperature and high-pressure pump for refining, coal chemical, power generation, new energy, and overseas EPC projects.

In practical application, the high-temperature and high pumps manufactured by Jiangsuifa Machinery Manufacturing Co Ltd. have been widely in large-scale domestic and international refining and energy facilities. Typical usage scenarios include a domestic 2.6 million tons/year integrated refining residue hydroprocessing unit, a 4.4 million tons/year integrated refining residue hydrodesulfurization unit, and a 2 million tons/year hydrocracking unit; the Russian market mainly focuses on a hydrocracking unit at a refinery in Volgograd and a 3.5 million/year VGO hydrocracking system at a refinery in the Volga Federal District; Middle East region includes 400,000 BPD full-conversion refining-petrochemical complex project in the Jazan Economic City industrial area, and a large refinery in the Ruwais Industrial City, Al Dhafra region. These units commonly feature high temperature, overpressure, hydrogen service, sulfur content, flammability, and long continuous operating cycles, requiring API 610 BB2, BB4, BB5, and OH2 series pumps. Jiangsu Haifa has focused on controlling material hydrogen attack resistance, pump casing thermal expansion, system hot alignment, seal temperature, and online vibration monitoring.

FAQ Frequently Asked Questions1. Why do high-temperature and high-pressure pumps typically use a centerline support structureCenterline support allows the pump casing to expand more uniformly around the axis heating up, reducing changes in the pump shaft center height and hot misalignment between pump and the motor. For high-temperature OH2, BB2, and5 pumps, this must be combined with guide, sliding supports, and cold pre-offset to control thermal displacement.2. Can simply adding an insulation jacket solve mechanical seal leakage in high-temperature pumps?No. An insulation jacket is primarily used to maintain the medium temperature and prevent crystallization or solidification. The stability of a mechanical also depends on the seal chamber pressure, flush fluid temperature, face materials, flush plan, and medium vaporization pressure. design, insulation,, seal structure, and the API flush system must checked as an integrated whole.