RD-3505 350kV Portable X-ray Flaw Detector Oil Pipeline Weld Radiography NDT Inspection Equipment

RD-3505 350kV Portable X-ray Flaw Detector for Oil, Gas and Process Plant Radiography

The RD-3505 is a 200–350 kVp constant-potential, SF6 gas-insulated radiography set built for inspection crews working on refinery piping, cross-country pipelines, storage tanks and wellhead equipment. Its 34 kg generator head reaches 55 mm Fe in a five-minute exposure at 600 mm focal distance, and the 4:1 work-to-rest cycle permits 15 minutes of continuous exposure before the controller schedules its own cooling pause. The package is completed by the MIXN controller, a 25 m nine-core control cable and a three-core power cable, so a survey team can land on site with one case and start producing film the same day.

Engineered Around Oil and Gas Inspection Schedules

• 350 kVp output with 5 mA and ±1% stability – covers 20–55 mm wall thickness in the carbon-steel range typical of line pipe, risers and vessel shells.
• 55 mm Fe in five minutes – short exposures keep source dwell time low on live-plant shutdown windows and reduce the radiation-controlled area footprint.
• 34 kg head with end rings – one tag line and two technicians position it on scaffolding, inside tanks or on pipe racks without a crane lift.
• Automatic 4:1 duty cycle – 15 minutes of exposure followed by controller-managed rest, matched to the pace of a weld crew moving from joint to joint.
• Gas pressure interlock logic – the system must not be operated below 0.35 MPa insulation gas pressure, protecting the tube during transport between sites.
• Discharge self-protection – after 48 hours idle the controller re-trains the tube by itself, which matters when a set sits in a warehouse between turnarounds.
• Safety-door and over-temperature alarms – “SD” interlock for shielded enclosures and “HT” thermal cut-out for hot process areas.
• Audit-friendly record keeping – cumulative exposure hours are stored by the controller, giving asset owners a traceable tube-utilisation log for maintenance planning.

Typical Inspection Duties

Technical Data

Controller and Power Supply

Site Readiness Checklist

Exposure Planning Notes

• Select kV and time from the exposure reference curves supplied with the manual for the film class and intensification in use.
• For 20–30 mm line pipe, SWSI with a 600–700 mm source-to-film distance is the usual starting point; increase distance rather than time when geometric unsharpness must be reduced.
• Dense-area coverage on 40–55 mm vessel seams normally requires double-wall technique at the nozzle positions; verify with the density step wedge on site.
• Record generator serial, tube serial and cumulative exposure hours at the start and end of each work pack for the asset owner's maintenance file.

Compliance and Documentation Support

Delivery and Commercial Terms

Supplied with Each Set

Company Introduction

Hangzhou Huiwei Nondestructive Testing Equipment Co., Ltd. is a manufacturer of industrial radiography equipment based at 3 Miaochangqiao Road, Liangyun Street, Liangzhu, Yuhang District, Hangzhou, China. Our workshops assemble portable X-ray generators from 160 kVp to 360 kVp, gas-fill and pressure-test every tube head, and run high-voltage conditioning on matched controllers before dispatch. Alongside generators and controllers we supply flat panel detectors, film processors, magnetic particle yokes, ultrasonic flaw detectors and radiography accessories. Oil and gas operators, pipeline contractors, inspection houses and refineries in more than 50 countries work with our equipment, and our technical desk answers commissioning questions in English within one working day. Telephone +86 571 8875 4795, fax +86 571 8875 4564.

Questions Buyers Ask

Request a quotation: tell us the pipe or plate thickness range, the joint type and the acceptance standard you work to, and we will confirm the technique, accessory list and price for your project within one working day.