Packing Ring Performance Test Report
Product Performance Test Report
Report Number: 17QX909
No: 20180129002
Product Name | Flexible Graphite Packing Ring | Sample Numbers | 18010633-2 (Ordinary Graphite) 18010632-4 (Nuclear Grade Graphite) 18010994-6 (High-Temperature Resistant Graphite)
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Product Batch Numbers | 18010632, 18010633, 18010994 | Quantity | 3 sets (2 pieces per set) |
Manufacturer | Zhejiang Magpie Sealing Co., Ltd | Product Specification | φ30*φ46*8 |
Date of Submission for Inspection | 2017-01-11 | Inspection Dates | From 2017-01-11 to 2017-01-12 From 2017-01-15 to 2017-01-19 From 2018-01-22 to 2018-01-26 |
Test Item | Under the same temperature and humidity conditions, corrosion of metal materials when equipped with different grades of graphite packing rings | ||
Test Basis | JB/T 9143-1999 Method for Corrosion Test of Anti-corrosive Asbestos Packing | ||
Test Equipment | Equipment Name: High and Low Temperature Chamber | ||
Note | Valve Stem Material: 45# Steel Graphite materials: 9104 is ordinary graphite; 9204 is nuclear-grade graphite; 9404 is high-temperature resistant graphite. | ||
Item | 9104 Ordinary Graphite | 9204 Nuclear-Grade Graphite | 9404 High-Temperature Resistant Graphite |
Total Sulfur Content (mg/kg) | ≤1200 | ＜200 | ＜200 |
Total Halogens Content (mg/kg) | -- | ＜200 | ＜200 |
Free Chlorine Content (mg/kg) | ≤80 | ＜30 | ＜50 |
Free Fluorine Content (mg/kg) | -- | ≤50 | ＜50 |
Thermal Loss (450℃) (%) | ≤1.0 | ≤0.5 | ＜0.3 |
Thermal Loss (600℃) (%) | ≤20 | ≤20 | ＜3 |
Thermal Loss (700℃) (%) | -- | -- | ＜12 |
Tensile Strength (MPa) | ≥4 | ≥4.5 | ≥4.5 |
1. Appearance of No. 18010633-2 (Ordinary Graphite)
2. Appearance of No. 18010632-4 (Grade 9204 Nuclear Graphite)
3. Appearance of No.: 18010994-6 (Grade 9404 High-temperature Resistant Graphite)
No. | Gasket No. | Size Specifications | Material | Test Parameters | Remarks | ||||||||||
Temperature (℃) | Humidity (%) | Time (h) | Axial Clamping Force (MPa) | ||||||||||||
1 | 18010633-2 | φ30*φ46*8 | 9104 | 55±2 | 95±3 | 5*24 | 1.5 | Pitting observed at packing contact area | |||||||
2 | 18010632-4 | φ30*φ46*8 | 9204 | 55±2 | 95±3 | 5*24 | 1.5 | Maintained original brightness | |||||||
3 | 18010994-6 | φ30*φ46*8 | 9404 | 55±2 | 95±3 | 5*24 | 1.5 | Less than 1/3 area of packing contact lost luster | |||||||
Assessment Standard | |||||||||||||||
Grade 1 | Maintained original brightness | Refer to the requirements in JB/T 9143-1999 Corrosion Test Method for Anti-corrosive Asbestos Packing | |||||||||||||
Grade 2 | Less than 1/3 area of packing contact lost luster | ||||||||||||||
Grade 3 | Pitting observed at packing contact area | ||||||||||||||
Grade 4 | Severe corrosion at packing contact area | ||||||||||||||
Results | □ Qualified □Unqualified √Other | Signature |
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Notes | Based on the comparison of the valve stem before and after testing: 18010632-4 (Grade 9204 Nuclear Graphite) is Grade 1. 18010994-6 (Grade 9404 High-temperature Resistant Graphite) is Grade 2. 18010633-2 (Grade 9104 Ordinary Graphite) is Grade 3. | ||||||||||||||
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