Refineries are among the most demanding environments in the process industry. High pressures, corrosive media, tight turnarounds and strict regulatory requirements shape every project. HSOS has supported EU refineries since 2007 — from emergency leak sealing on an FCC main line to a full TAR programme during a major turnaround.
Our focus is on the critical disciplines that decide downtime length and restart safety: PWHT on reactor welds, controlled bolt-tensioning on high-pressure flanges, portable CNC machining and online leak sealing. All work is documented to API, ASME and AD standards.
Track record: 100+ turnarounds in European refineries (incl. Shell Pernis, PCK Schwedt, BP Lingen, OMV Bayernoil) focused on FCC, HDS, hydrocracker and vacuum-distillation units.
Challenges
- ▸FCC reactor and riser: high-temperature materials (P22, P91), thermal cycling
- ▸Hydrocracker: high H2 partial pressure, HTHA and SCC susceptibility
- ▸Vacuum distillation: thin walls, corrosion under insulation (CUI)
- ▸Sour service per NACE MR0175 / ISO 15156
- ▸Tight major turnaround windows (3-6 weeks), 24/7 shifts
- ▸Strict API documentation: API 510, API 570, API 580/581 (RBI)
Our experience
- ✓100+ refinery turnarounds since 2007
- ✓PWHT documentation per AD 2000 HP 7/1 and ASME PCC-2
- ✓Bolt-tensioning records with ±5% accuracy, audit-ready
- ✓Equipment: 30+ kVA to 100 kVA heat treatment, split-frame to 3,000 mm
- ✓Material expertise: Cr-Mo, Duplex, Hastelloy, P-No. 1 to 5C
References
FAQ
What is HSOS refinery track record?
100+ turnarounds across European refineries since 2007. Specialised in FCC, HDS, hydrocracker and vacuum distillation.
Is your documentation API-compliant?
Yes — PWHT and bolting records meet API 510, API 570, ASME PCC-2 and are audit-ready.
How fast can you respond to a refinery emergency?
Within 4-8 hours in DACH and Benelux; up to 24 h anywhere in Europe. 24/7: +49 (0) 2335 91094-00.
Can you work on HTHA materials?
Yes — Cr-Mo steels (P22, P91, T22) including PWHT per AD 2000 HP 7/1 and ASME B31.3.
Always available – fast on site
Less downtime, less production loss. Contact us – 24/7.
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