Amine Gas Sweetening H2S Removal High Speed Centrifugal Pump for Refinery
Amine Gas Sweetening H2S Removal High Speed Centrifugal Pump for Refinery
Amine Gas Sweetening H2S Removal High Speed Centrifugal Pump for Refinery
Brand Name
Sunstrand
PRODUCT MODEL
AGSP-610-NACE
certificate
ISO 9001:2015, API 610, NACE MR0175
country of origin
China
MOQ
1 Set
unit price
Negotiation
payment method
T/T,L/C
Supply Capacity
8 Sets per Month
Product Summary
High speed centrifugal pump specifically designed for amine gas sweetening circulation service, H2S and CO2 removal in refinery and gas processing plants, with NACE MR0175 compliant construction for sour service environments.
Product Details
Highlight:
Amine Service Centrifugal Pump
,Gas Sweetening Process Pump
,H2S Removal Circulation Pump
Service:
Amine Circulation (MEA, DEA, MDEA)
Sour Service Compliance:
NACE MR0175 / ISO 15156
Maximum Flow:
85 M³/h (375 GPM)
Maximum TDH:
914 M (3,000 Ft)
Wetted Materials:
316 SS Or Duplex (H2S Partial Pressure Dependent)
Seal System:
API 682 Plan 53B Dual Pressurized
Temperature Range:
-50°C To +200°C
Design Code:
API 610 OH6
Application:
Amine Wash, Gas Sweetening, H2S/CO2 Removal
Product Description
Amine Gas Sweetening H2S Removal High Speed Centrifugal Pump for Refinery
High Speed Centrifugal Pump for Amine Gas Sweetening and H2S Removal Service
Our practical experience with amine circulation pump failures began not as a pump manufacturer but as a reliability engineering consultancy. Between 2008 and 2011, our founding engineers conducted failure analysis investigations on over 30 amine pump incidents across 8 gas processing facilities, documenting the dominant failure mechanisms: sulfide stress cracking of carbon steel bolting due to uncontrolled hardness, amine salt crystallization causing mechanical seal face pitting, and corrosion-induced casing wall thinning in hot lean amine service.
This forensic understanding of amine pump failure modes became the design basis for our amine service high speed centrifugal pump, where each potential failure mechanism identified in our root cause analysis database is addressed through a specific design feature, material requirement, or quality assurance control.
The metallurgical requirements for sour amine service are implemented through a NACE MR0175/ISO 15156 compliance program that we have refined through multiple client audits and third-party laboratory verification. All carbon and low-alloy steel components in contact with the amine solution are hardness-tested after final heat treatment to verify Rockwell C hardness below 22 (equivalent to 237 Brinell), with test results recorded on dimensional inspection reports.
Technical Specifications
| Parameter | Specification | Compliance Reference |
|---|---|---|
| Service | Amine Circulation: MEA, DEA, MDEA, DGA, Formulated | Material selection per amine type & temperature |
| Sour Service Standard | NACE MR0175/ISO 15156 Compliant | Material certs, hardness records, HT charts |
| Maximum Flow Rate | 85 m³/h (375 GPM) | Calibrated flow meter, 5-point verification |
| Maximum Differential Head | 914 m (3,000 ft) | Deadweight-tested pressure transmitters |
| Design Standard | API 610 12th Ed., OH6 Category | Design review per Annex A checklist |
| Material Hardness Control | HRC ≤ 22 (Carbon/Low-Alloy Steel) | 100% hardness testing, recorded per component |
| Wetted Material Options | 316 SS / Duplex 2205 / Hastelloy C-276 | Selection per amine type, temperature, H2S ppm |
| Temperature Range | -50°C to +200°C (-58°F to +392°F) | Material capability verified |
| Shaft Sealing | API 682 Plan 53B Dual Pressurized Cartridge | FFKM elastomers, amine-compatible barrier fluid |
| Flange Bolting | ASTM A193 B7M / B8M Class 2 | Hardness-tested, MTR provided |
Amine Service Failure Prevention Engineering
- Amine Salt Seal Failure Elimination: Based on our failure analysis database identifying amine salt crystallization as the leading cause of mechanical seal failure in amine circulation pumps, we have implemented a robust sealing strategy. The API 682 Plan 53B dual pressurized cartridge seal maintains a clean synthetic barrier fluid at a pressure 1.5-2.0 bar above the maximum seal chamber pressure, ensuring that any leakage across the inboard seal faces consists of barrier fluid entering the pump rather than amine solution migrating to the seal faces.
- Corrosion Allowance Based on Measured Corrosion Rates: Our material selection philosophy for amine service is informed by published corrosion rate data from API 581, NACE International Publication 6A294, and operating experience data shared by our clients during failure investigations. For carbon steel pump casings in hot lean amine service above 120°C, we apply a minimum corrosion allowance of 3.2 mm (0.125 inch) on all wetted surfaces.
- Sulfide Stress Cracking Prevention Program: Every fastener, shaft, spring, and load-bearing component in the amine circulation pump is evaluated against NACE MR0175/ISO 15156 requirements using a structured compliance checklist maintained in our engineering document management system. Components requiring hardness control are tested after final heat treatment and machining using a calibrated Rockwell hardness tester.
- Rich Amine Corrosion Management: For pumps handling rich amine solution returning from the absorber column—which carries dissolved H2S and CO2 making it significantly more corrosive than lean amine—we provide specific operating recommendations based on our corrosion engineering experience: maintain amine solution velocity below 3 m/s in carbon steel piping to avoid erosion-corrosion at pipe bends and reducers; monitor iron sulfide particulate in the amine solution as an indicator of ongoing corrosion.
Frequently Asked Questions
Q1: Our existing amine circulation pumps experience seal failures every 8-10 months. How does your design address this specific problem?
We understand this problem intimately because analyzing it was the origin of our amine pump program. The root cause—as our failure investigations repeatedly demonstrated—is amine salt crystal formation at the atmospheric side of single mechanical seal faces when hot amine solution flashes upon exposure to atmospheric pressure, leaving behind crystalline residues that embed in the carbon seal face and machine grooves into the hard face within weeks. Our solution is the API 682 Plan 53B dual pressurized seal with a clean barrier fluid at higher pressure than the seal chamber, which fundamentally prevents amine solution from reaching the seal faces at all. We have 47 amine circulation pumps operating with this configuration, and our aftermarket service records show zero seal failures attributed to amine salt crystallization over a cumulative 200,000+ operating hours.
Q2: How do you ensure that the materials supplied are genuinely NACE MR0175 compliant and not just claimed to be compliant?
Our NACE compliance verification program includes multiple independent checks rather than relying on a single certificate. Each pressure-retaining component: (1) is manufactured from material with an EN 10204 Type 3.1 certificate from the producing mill specifically declaring NACE MR0175/ISO 15156 compliance; (2) undergoes positive material identification using handheld XRF at goods-inward inspection; (3) is hardness-tested after final heat treatment and machining at our factory, with three indentations per component recorded on a hardness test report; (4) is reviewed by our quality assurance engineer against the specific NACE MR0175 table applicable to that material grade. This multi-step verification process provides objective evidence of compliance and has successfully passed audits by multiple international oil company materials and corrosion engineering teams.
Q3: What amine solution types and concentrations have your pumps been proven to handle?
Our amine service pumps are currently operating in plants using MEA (15-20 wt% solution, predominantly in older North American gas plants), DEA (25-35 wt%, common in refinery H2S removal), MDEA (40-50 wt%, the predominant choice for modern gas processing due to its selectivity for H2S over CO2 and lower regeneration energy), and formulated MDEA-based solvents containing proprietary activators and corrosion inhibitors (such as BASF aMDEA and Dow UCARSOL). We have specific material selection guidelines for each amine type based on our field experience: MDEA at typical lean amine temperatures up to 130°C is generally compatible with 316 SS wetted components; formulated MDEA with corrosion inhibitors can often use carbon steel wetted components with appropriate corrosion allowance at lean temperatures below 120°C; and DEA and MEA at rich amine conditions benefit from duplex stainless steel wetted components due to the higher corrosion potential of primary and secondary amines with high acid gas loading.
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