# Service report — June 2026

Werkhof Anlagenservice Brandt, plant engineering office
Author: L. Petersen, service technician
Date: 2026-06-17

## PV-014 — annual pressure-vessel inspection (2026-06-11)

The 5000 l process buffer vessel PV-014 passed its annual inspection on 11 June 2026. Findings:

- Wall thickness at nozzle N2 measured 6.2 mm, down from 6.8 mm at the 2023 inspection.
- The pressure test was passed at 14 bar test pressure.
- Surface corrosion at nozzle N2 was ground back and recoated.
- The inspection interval is shortened from 24 to 12 months; the vessel is under observation.

Petersen recommends budgeting for a replacement vessel in 2028 rather than re-nozzling the
current one — in his view the wall-thickness trend at N2 will not support another re-coating
cycle.

## HX-201 — tube leak, taken out of service (2026-06-12)

The shell-and-tube heat exchanger HX-201 developed a tube leak on the shell side and was taken
out of service on 12 June 2026. The machine register still lists HX-201 as in service; the
register entry is to be corrected with this report. Process cooling runs on the plate heat
exchanger HX-210 alone until the tube bundle is replaced; HX-210 has the capacity for this at
summer load, but not at full winter load.

## KP-011 — fault E-142 (2026-06-09)

Screw compressor KP-011 logged fault E-142 (compressed-air pressure sensor fault) on 9 June
2026. The pressure sensor was replaced and the control loop recalibrated the same day; the
compressor was back in service after four hours.

## Nordwerk Maschinenbau (K-007) — site visit Wischhafen (2026-06-16)

Site visit at Nordwerk Maschinenbau GmbH in Wischhafen on 16 June 2026:

- The framework contract was extended to the end of 2028.
- From 2027 Nordwerk moves to two scheduled service visits per year.
- New maintenance contact on the Nordwerk side: R. Albers, plant manager.
- Albers complained that the April call-out took three days to schedule; Petersen agrees the
  response time on frame-contract call-outs must improve.

## Open items

- Order the replacement tube bundle for HX-201 (target: July 2026).
- Schedule the ultrasonic re-test of PV-014's wall thickness for December 2026.
- Send Nordwerk the updated maintenance plan for 2027.
