AF Hydro stands for Addison Fluids and was founded since the year 2016. AF Hydro is based in Singapore. AF Hydro is a renowned local brand and has been actively supporting various industries with high quality industrial products. AF hydro has focused to create integrity products to clients by providing consistent high quality service without failure. It enables clients to work quickly and reliably in an efficient way.
History of AF Hydro
The material includes stainless steel, cast steel, cast iron, brass and forged steel. All AF Hydro products undergo relevant testing in accordance with regulations and high standards of the in-house quality management system. The products have been supplying to different industries such as:
The overall range currently includes about 2,000 standard products under three categories:
(i) AF Valves
(ii) AF Fittings
(iii) AF Tubes
- Engineering & Offshore
- HVAC Industry
- Refinery, Oil & Gas
- Chemical Industries
- Water Treatment Works
- Pharmaceutical
- Construction Industry
The overall range currently includes about 2,000 standard products under three categories:
(i) AF Valves
(ii) AF Fittings
(iii) AF Tubes
1 PC Ball Valve
|
ANSI SS316 150# Swing Check Valve
|
JIS10K SS316 Flange End Gate Valve
|
AF Hydro Quality Control Process
In order to keep our brand promise to clients, AF Hydro has in-house pressure rating testing for each batch of products according to heat number to ensure the valve quality control process. A batch test according to heat number for each product is tested to ensure that working pressure and leakage requirement are met before supplying the valves to client.
The overall testing ratio for new stock heat number is 2%.
The overall testing ratio for new stock heat number is 2%.
No |
Purchase Quantity (pcs) |
Testing Quantity (pcs) |
1 |
< 50 |
1 |
2 |
51 to 100 |
2 |
3 |
101 to 150 |
3 |
4 |
151 to 200 |
4 |
5 |
>200 |
5 |
What is AF Hydro testing standard?
AF Hydro valves are tested according to API 598. It stands for American Petroleum Institute which covers testing and inspection requirements for low pressure ball, check, gate, glove and butterfly valves.
API 598 indicates shell and backseat tests, no visible leakage is permitted through the body, body liner or joints. Example, there is no visible evidence of drops or wetting of the external surfaces. The standard test is hydrostatic test of 1.5x of the maximum valve cold working pressure rating.
For liquid test, 1 millilitre and 1 cc is considered equivalent to 16 drops. There shall be no leakage allowed for the minimum specified test duration. 0 drop means no visible per minimum specified test duration for liquid test. While 0 bubble means less than 1 bubble per minimum specified test duration for gas test.
API 598 indicates shell and backseat tests, no visible leakage is permitted through the body, body liner or joints. Example, there is no visible evidence of drops or wetting of the external surfaces. The standard test is hydrostatic test of 1.5x of the maximum valve cold working pressure rating.
For liquid test, 1 millilitre and 1 cc is considered equivalent to 16 drops. There shall be no leakage allowed for the minimum specified test duration. 0 drop means no visible per minimum specified test duration for liquid test. While 0 bubble means less than 1 bubble per minimum specified test duration for gas test.
DN (mm) |
NPS (in) |
Liquid Test (Drops/min) |
Gas Test (Bubbles/min) |
≤ 50 |
≤ 2 |
||
65 |
2 1/2 |
5 |
10 |
80 |
3 |
6 |
12 |
100 |
4 |
8 |
16 |
125 |
5 |
10 |
20 |
150 |
6 |
12 |
24 |
200 |
8 |
16 |
32 |
API 598 (9TH Edition 2009) Valve Seat Leakage Rates for all Metal-Seated Valves except Check Valves
DN (mm) |
NPS (in) |
Liquid Test (cc/min) |
Gas Test (m3/min) |
≤ 50 |
≤ 2 |
6 |
0.08 |
65 |
2 1/2 |
7.5 |
0.11 |
80 |
3 |
9 |
0.13 |
100 |
4 |
12 |
0.17 |
125 |
5 |
15 |
0.21 |
150 |
6 |
18 |
0.25 |
200 |
8 |
24 |
0.34 |
API 598 (9TH Edition 2009) Valve Seat Leakage Rates for all Metal-Seated Check Valves
To find out more about AF Hydro products, please view our product pages below:
