Pinhole Detector To Test Protective Coatings Flaw Of Oil And Gas Pipelines, Cables, Enamel, Metal Tank
Details:
【Function】
HD-201 Porosity Holiday detector is a special testing equipment used to detect oil and gas pipelines, cables, enamel, metal tank, hull and other protective coatings flaws. It is a simple and practical equipment.
【Characteristic】
1,Low power consumption, small size, light weight；
2,Simple operation；
【Main technical index】
1,Measuring range:
HD-201A:0.03-3.5mm(Epoxy coal tar pitch medium)
HD-201B:3.5-10.mm(Petroleum asphalt medium)
HD-201C:0.03-10.mm(Epoxy coal tar pitch,Petroleum asphalt medium)
3,Output high voltage:
HD-201A:0.5-15KV
HD-201B:15-35KV
HD-201C:0.5-35KV
4,Display:pointer
5,High voltage control system:Ordinary potentiometer adjustment
6,DC supply:12v
7,Consumption:＜5w
8,Alarm delay:1-2s
9,High voltage probe:Electronic high voltage generator
10,Packing:metal chest
11,Main dimension: 165mm×155mm×68mm
12,Weight:1.5kg(Including battery)
【Principle】
The detector generates a high DC voltage that is applied to the coating surface through a probe. The detector is connected to the substrate via the high voltage returned. When the probe is passed over a coating flaw, then the electrical circuit is completed and current flows from the probe to the substrate. As a result, audible and visual alarms are activated in the detector and a spark may be produced at the flaw.
【Test voltage schedule】
| Anticorrosion material | Coating thickness | Detection voltage | Remarks |
|
Epoxy coal tar pitch Two oil cloth |
0.2 0.4 0.6 0.8 |
4-5KV Or self |
If standard shall be implemented according to the standard |
|
Petroleum pitch |
2 3 5.5 7 9 |
11 15 18 20 24 |
|
| Polyethylene tape |
According to: 3249TC=V formula conversion V: voltage TC: anti-corrosion layer thickness Standard implementation of SY4014-92 acceptance criteria |
||
| Glass lined | Depending on the experience, the detection voltage is generally 8KV-20KV | ||
| Other anticorrosive materials | Depending on the design of the design department to detect the insulation performance of the voltage or the material itself. | ||
【Standard delivery】
Main unit
High voltage gun
High voltage gun
Charger
Long cable
Short cable
Connecting magnet
Earth rob
high pressure gloves
Instruction manual
HUATEC calibration certificate
