Engineering for FRP tanks, pressure vessels, composite wings, boat parts and vehicle chassis. Calculated to code, built to schedule, certified for inspection.
For decades, tanks and composite parts were built from laminates copied from the last job. We start from the loads instead and place every ply where it carries them.
See how it works →
How we operate. We take a tank or composite structure from the first load case to a certified, installed part: calculation, laminate design, drawings, training the people who build it, and the inspection dossier.
Material goes where the load is. Shells get thinner and openings get stronger.
Reports written for the inspector, with the governing case for every component.
Calculation, drawings, training and certification from the same engineers.
Engage us for a single step, such as a calculation check, or for the full sequence through to acceptance.
Operating conditions, stored medium, design life and the governing standard.
Resin system, reinforcement, ply schedule and liner selection.
Strength, stiffness and buckling checks to standard, in a written report.
General arrangement, details and the laminate schedule for the shop.
On-site checks during lay-up, cure and assembly.
Test panels, hydrotest witness and the final dossier.
Trusted by industry ↓
Composite manufacturers, defence and naval industry and industrial fabricators across Türkiye.
Standard tank calculations and design checks at a fixed price, with the deliverables agreed up front.
A composite engineer on call for fabricators and shipyards, on a monthly agreement.
Domestic projects run from Türkiye. International projects and training contracts run through our UK company.
Calculation, laminate, documentation and the training of the people who build it.
EN 13121 and ASME RTP-1API 650 and EN 14015ISO 12215 and class rulesEN 10204 3.1 inspection certificates and traceability files| Material | Typical equipment | Design codes |
|---|---|---|
| Composite (GRP / FRP) | Storage tanks, process vessels, scrubbers, ducts | EN 13121-3 · ASME RTP-1 · BS 4994 |
| Steel | Atmospheric storage tanks, pressure vessels | API 650 · EN 14015 · EN 13445-3 |
| Thermoplastic (PP, PE, PVDF) | Chemical tanks, basins and pits | DVS 2205 · EN 12573 |
| Structural composites | Wings, panels, marine structures | ISO 12215 · class rules · laminate theory + FEA |
Rudders, rigs and appendages carry the highest loads on a boat and fail with the least warning. We size them by calculation to ISO 12215 and class rules, and design laminates the yard can build.
ISO 12215-8Carbon and glass rudder stocks, blades and bearings sized for bending, torsion and grounding loads.
ISO 12215-8Composite tillers, quadrants and steering arms checked for helm forces and fatigue.
ISO 12215-10Mast tube, boom and spreader laminates from rig load analysis, with buckling and local checks at fittings.
ISO 12215-9Keel fins, daggerboards and centreboards for grounding, knockdown and fatigue loads.
FEAHydrofoils, skegs and trim tabs designed for lift and impact loads.
ISO 12215-10Composite chainplates and bulkhead tie-ins that carry rig loads into the hull.
ISO 12215-5Bottom, side and deck panel scantlings, stiffeners and sandwich cores.
Torsion · whirlComposite propeller and drive shafts, tubes and struts sized for torsion and critical speed.
Composite chassis and energy absorbers have to pass destructive tests the first time. We model stiffness, strength and crash behaviour with implicit and explicit FEA, then design the laminate and the test plan.
Torsional stiffness · FEATorsional and bending stiffness, load paths into suspension and roll-structure hard points, and ply-by-ply laminate optimisation.
Explicit crash · SEACrushable composite nose cones and energy absorbers sized for mean deceleration, peak load and specific energy absorption.
Explicit FEASide impact panels and anti-intrusion laminates checked against penetration and energy targets.
Fatigue · bucklingComposite wishbones, push rods and uprights with bonded metal inserts.
CFD loads → FEARear wings, diffusers and floors sized from aerodynamic loads for strength and deflection limits.
Crush · thermalComposite EV battery boxes for crush loads, intrusion and fire-resistant laminates.
Each report lists the governing load combination for every component, so the inspector can follow the numbers without calling us.
Liquid height × densityHoop and axial stresses through the full fill height.
Design ± mbarShell and roof buckling under internal vacuum and overpressure.
EN 1991-1-4Shell buckling when empty, overturning and anchor loads.
EN 1998-4 · TBDY 2018Impulsive and convective liquid mass, base shear and sloshing height.
EN 1991-1-3Roof laminate, walkways and platforms.
Local loadsReinforcement pads and local stresses at every opening.
Lug positionsLifting lugs and shell stresses during handling and erection.
Hold-downAnchor bolt loads and foundation reactions.
Design factorResin heat-deflection limits and long-term strength reduction.
FatigueStrain limits for tanks that fill and drain every day.
We design the part, machine the plug, build the mould and laminate the first articles. You test a real part in your own system before committing to series tooling.
Laminate and geometry sized by calculation.
CNC-machined master model from your CAD data.
Composite mould built off the plug, ready for lay-up.
First articles laminated to the written schedule.
Fit, function and load tests in your system.
Small batch with a techno-economic case for series production.
Replace a steel or aluminium part with a lighter composite one: same loads, same interfaces, checked by calculation and confirmed by test.
Send the drawings and the duty. You receive a calculation report the inspector accepts, a laminate schedule your shop can build from, and answers when your client asks questions.
Tanks outlive their original paperwork. We assess what is standing in your plant and tell you what it can still safely do.
Specifications and tender files that hold suppliers to a measurable standard, followed by technical review of what they deliver.
When a composite structure fails, we establish why and put it in a written report others can rely on.
01 / 05Storage, treatment and dosing tanks for utilities and municipalities.
02 / 05Acid, alkali and solvent service where steel corrodes.
03 / 05Hull and deck structures, appendages and unmanned vessels.
04 / 05Composite wings, control surfaces and lightweight frames.
05 / 05Monocoque chassis, crash structures and lightweight body parts.
Standards-based FRP laminator training for shipyards and fabricators, delivered at your facility. Every trainee sits a written exam, builds a test panel and receives a verifiable certificate.
Safety, materials, hand lay-up and spray-up, wet-out and consolidation.
Practical-heavy · 60% workshopInfusion, core materials, reading ply schedules from drawings, defect recognition and repair.
Test panel: thickness ±10 %, Barcol hardness, glass contentProcess control, quality records, supervision of crews and handover to inspection.
Certificate valid 2 years · QR verificationIn Europe and Türkiye, EN 13121 is the main standard for GRP tanks and vessels. Projects specified to US practice use ASME RTP-1, and some older UK specifications still call for BS 4994. We design to whichever standard your contract names.
Diameter and height, roof and bottom type, the stored medium and its density, design temperature, design pressure and vacuum, the site location for wind and seismic loads, the nozzle list and the required standard. A general arrangement drawing helps if you have one.
Yes. We run an independent check against the governing standard and return a report listing every non-conformity with a proposed fix.
Yes. International projects and training contracts run through our UK company, and all reports are available in English.
GUREN Engineering issues it against a written, standards-based training and assessment scheme. It serves as competence evidence under ISO 9001 clause 7.2 and supports shipyard and workshop approvals. It is not a national vocational qualification such as MYK.
Volume, stored medium, temperature and the standard you need to meet are enough for a first reply. We answer within two working days.