Oil and gas buildings — three decisions come before any member is sized

By Johnny, export engineer at Hebei Hongji Shunda Steel Structure Engineering Co., Ltd.

The order of decisions

Fire separation first, because it decides whether a wall is a wall or a fire barrier, and a fire barrier carries a different cladding, a different penetration detail and a different frame tolerance.

Hazardous-area classification second, because it decides the electrical fittings, the door hardware, the ventilation and whether the space can be sealed at all. A classified space closed up like an ordinary workshop will not pass the review it was built for.

Lifting clearance third, because maintenance access for valves and flanges is what actually sets the eave height on a pump house or a compressor shelter. The equipment footprint almost never does.

Pipe racks are not buildings

A pipe rack is a support structure: it carries pipe, it carries the thermal movement of that pipe, and its bracing follows the pipe route rather than an architectural plan. It is priced as a separate line because it is a separate design problem, and mixing it into the building rate hides where the cost is.

A pipe yard is set by the longest joint that has to be handled under cover, not by the pipe inventory. Get the longest joint and the lifting equipment, and the clear height follows.

The small buildings that carry the risk

Lubricant and chemical stores are the ones most often under-detailed. They are a fire compartment with a bund, a spill containment floor and often a blast relief requirement, and they are small enough that people assume they are simple.

Switchgear and control buildings are steel enclosures carrying a concrete-grade expectation: the enclosure has to keep water out for twenty years and keep heat out for one afternoon. Cable entry, earthing and door tolerances are the details that decide whether that happens.

Tank farms bring their own structure: the bund wall is civil, but the pipe supports crossing it, the stair and the access platform are steel and they move with the tank.

What we can and cannot show you

The five buildings published on this site are two food factories in Brazil, two waste treatment plants and a logistics warehouse in Burkina Faso. None of them is an oil and gas project. What is behind this page is how the building type is detailed, not a delivery record in the sector.

Verifiable today: 125,000 m² production base, six workshops, four 150 t overhead cranes from 2026 in the West Zone, exporting since 2004, ISO 9001 certificate 19822QA0131R1S valid to January 2028.

Numbers behind this page

Production base 125,000 m² across six workshops; overhead cranes four at 150 t each in the West Zone from 2026; factory established 2000, current company name since 2014, exporting since 2004; quality management ISO 9001 — certificate 19822QA0131R1S, valid to January 2028. Certificate and inspection records.

Delivered spans so far 30 m to 100 m at 6 m or 7 m bay spacing, five buildings totalling 19,800 m² in Brazil and Burkina Faso. The full record, in numbers.

Notes on this sector

• Lubricant and chemical store: the fire compartment is the building
• Switchgear building as a steel enclosure
• Tank farm: bund, support and movement
• Pipe rack access towers
• Pipe yard clear height is set by the longest joint

Next step

Send the process inside the building and the loads it has to carry — span, length, eave height, crane duty or none, and the roof and wall spec you are working to. Sizing comes back as a drawing question, not a price. Send a project description.