Oil & Gas Equipment Cases: API 6A, ATEX, NACE MR0175

A Cameron SL-T wellhead control panel ($85,000-$350,000) shipped from Houston to an offshore platform in the North Sea arrived with a damaged hydraulic control valve. The cause? A standard steel shipping crate with 25mm of loose-fill polystyrene that shifted during supply vessel transport, allowing the 350kg panel to move 20mm inside the crate and impact the crate wall during a 15g wave impact in the North Sea. The repair required a replacement hydraulic control valve ($12,500), a full re-calibration of the wellhead control panel ($8,200 in engineering time), and a 7-day delay in the platform’s drilling schedule. The platform’s day rate was $420,000 per day (a typical deepwater drilling rig costs $300,000-$600,000 per day)—so the total cost of that damaged hydraulic control valve was $2,960,700.

Oil and gas equipment spans the entire production chain: from wellhead control panels and ESP (Electric Submersible Pump) controllers that control well production, to SCADA RTUs and field instruments that monitor and control production, to NDT (Non-Destructive Testing) and inspection equipment that inspects pipelines and equipment, to MWD/LWD (Measurement While Drilling/Logging While Drilling) and downhole tools that drill and evaluate wells, to subsea and offshore equipment that operates in deepwater environments. What unites them is that every component is part of a system where a single failure can cause a well control incident (which can cost $1,000,000-$10,000,000+), a production shutdown (which can cost $100,000-$1,000,000 per day), or in extreme cases, an environmental incident (from oil spills or gas releases). The transit case isn’t packaging—it’s the first line of defense against equipment damage during transport, and it must be specified to the same engineering rigor as the equipment it protects.

Regulatory Framework: API, ATEX, and NACE Standards

Oil and gas equipment transport cases must support compliance with a complex web of standards. For wellhead equipment, API 6A (Specification for Wellhead and Christmas Tree Equipment) specifies requirements for wellhead and Christmas tree equipment, including design, materials, testing, and documentation. The transit case must protect wellhead components (which can have precision-machined surfaces with tolerances of ±0.01mm, and must not be damaged by impact or by contamination) without compromising their performance, and must support the documentation chain required by API 6A (including material test reports (MTRs), inspection reports, and pressure test reports). For valves, API 6D (Specification for Pipeline and Piping Valves) specifies requirements for pipeline and piping valves, including design, materials, testing, and documentation. The transit case must protect valves (which can have precision-machined sealing surfaces that must not be damaged by impact or by scratching, causing leaks) without compromising their performance.

For hazardous areas, ATEX (Atmosphères Explosibles) and IECEx (International Electrotechnical Commission System for Certification to Standards Relating to Equipment for Use in Explosive Atmospheres) specify requirements for equipment used in explosive atmospheres. The transit case must protect Ex d (flameproof) equipment (which has flameproof gaps of 0.08-0.15mm that must not be damaged by impact or by contamination, causing loss of flameproof integrity) without compromising its ATEX/IECEx certification. For corrosion, NACE MR0175/ISO 15156 (Petroleum and natural gas industries—Materials for use in H2S-containing environments in oil and gas production) specifies requirements for materials used in H2S-containing environments (sour service). The transit case must protect sour service components (which can be damaged by hydrogen embrittlement, stress corrosion cracking, or sulfide stress cracking) without compromising their corrosion resistance, and must use VCI (Volatile Corrosion Inhibitor) packaging and desiccant to prevent corrosion during transport. For offshore equipment, DNV 2.7-1 (Offshore containers—Design, manufacture and marking) specifies requirements for offshore containers, including design, manufacture, testing, and marking. The transit case must meet the lifting and structural requirements specified in DNV 2.7-1 (including proof load testing of 2.5 times the maximum gross mass, and fatigue testing for containers used in dynamic lifting operations). For subsea equipment, API 17D (Design and Operation of Subsea Production Systems—Subsea Wellhead and Tree Equipment) and API 17E (Design and Operation of Subsea Production Systems—Subsea Umbilicals) specify requirements for subsea production equipment. The transit case must protect subsea components (which can have precision-machined surfaces, electrical connectors, and hydraulic connectors that must not be damaged by impact or by contamination) without compromising their performance.

Wellhead Panels, ESP Controllers, and SCADA RTUs: Core Equipment Transport

Wellhead control panels (hydraulic control panels, pneumatic control panels, electric control panels, emergency shutdown (ESD) panels) are typically shipped as complete panels with valves, gauges, switches, control systems, and documentation. The most critical areas are: hydraulic/pneumatic valves (which can have precision-machined spools with tolerances of ±0.005mm, and must not be damaged by impact or by contamination, causing valve sticking or failure), gauges and switches (which can have precision sensing elements that must not be damaged by impact or by vibration, causing inaccurate readings or switch failure), and calibration (wellhead control panels require precise calibration of pressure setpoints, timing sequences, and alarm thresholds, which can be affected by vibration during transport). Our wellhead control panel cases use: valve protection (custom foam with zero-contact foam on valve bodies, and custom valve locks to prevent valve movement during transport), gauge and switch protection (custom foam with zero-contact foam on gauge and switch bodies, and custom gauge protectors to prevent impact damage), calibration protection (custom foam that holds each component in its calibrated position, with zero-contact foam on all precision adjustment mechanisms), and IP65 sealing (continuous silicone gaskets, for protection against dust and moisture during transport and storage at well sites, which are often outdoors for 3-6 months before installation).

ESP controllers and VSDs (Variable Speed Drives) (ESP controllers, VSDs, switchboards, transformers, junction boxes) are typically shipped as complete units with power electronics, control systems, cooling systems, and documentation. The most critical areas are: power electronics (IGBTs, diodes, capacitors, which can be damaged by impact, by vibration, or by ESD, causing drive failure), connectors (power connectors, control connectors, communication connectors, which can be damaged by impact or by improper support, causing connection failure), and cooling systems (fans, heat sinks, which can be damaged by impact or by vibration, causing overheating and drive failure). Our ESP controller and VSD cases use: power electronics protection (custom foam with zero-contact foam on power electronic components, and ESD-safe foam (surface resistance 10^6-10^9 Ω/sq) to prevent ESD damage), connector protection (custom foam caps or plastic caps for all connector pins and communication ports), cooling system protection (custom foam with zero-contact foam on fan and heat sink components, and custom fan locks to prevent fan movement during transport), and IP65 sealing (continuous silicone gaskets, for protection against dust and moisture during transport and storage at well sites). SCADA RTUs and field instruments (RTUs (Remote Terminal Units), PLCs (Programmable Logic Controllers), transmitters (pressure, temperature, flow, level), analyzers (gas, liquid), sensors) are typically shipped as complete units with mounting hardware and documentation. The most critical areas are: calibration (field instruments require precise calibration of measurement ranges, zero points, and span, which can be affected by vibration during transport), ESD-sensitive components (which can be damaged by electrostatic discharge as low as 50V), and connector pins (which can be bent or broken by impact or by improper support). Our SCADA RTU and field instrument cases use: calibration protection (custom foam that holds each instrument in its calibrated position, with zero-contact foam on all precision adjustment mechanisms), ESD-safe foam (surface resistance 10^6-10^9 Ω/sq) for all electronic components, connector protection (custom foam caps or plastic caps for all connector pins and communication ports), and tamper-evident seals (for IEC 61511 safety instrumented system compliance—since safety instrumentation must be installed and calibrated by certified personnel, and chain-of-custody documentation is required).

NDT Equipment, MWD/LWD Tools, and Subsea Equipment: Specialized Transport Requirements

NDT (Non-Destructive Testing) and inspection equipment (ultrasonic testing (UT) equipment, radiographic testing (RT) equipment, magnetic particle testing (MT) equipment, liquid penetrant testing (PT) equipment, eddy current testing (ET) equipment, visual inspection (VT) equipment) are typically shipped as complete units with probes, transducers, calibration blocks, control systems, and documentation. The most critical areas are: probes and transducers (which can have precision sensing elements with tolerances of ±0.01mm, and must not be damaged by impact or by contamination, causing inaccurate measurements), calibration blocks (which can have precision-machined surfaces with tolerances of ±0.001mm, and must not be damaged by impact or by scratching, causing calibration errors), and ESD-sensitive components (which can be damaged by electrostatic discharge as low as 50V). Our NDT equipment cases use: probe and transducer protection (custom foam with zero-contact foam on probe and transducer sensing elements, and custom probe protectors to prevent damage), calibration block protection (custom foam with zero-contact foam on calibration block surfaces, and custom calibration block protectors to prevent scratching), ESD-safe foam (surface resistance 10^6-10^9 Ω/sq) for all electronic components, and IP65 sealing (continuous silicone gaskets, for protection against dust and moisture during transport to inspection sites, which are often outdoors or in industrial environments).

MWD/LWD (Measurement While Drilling/Logging While Drilling) and downhole tools (MWD tools, LWD tools, mud motors, rotary steerable systems, drill bits, fishing tools, completion tools) are typically shipped as complete tools with sensors, electronics, batteries, and documentation. The most critical areas are: threads (which can have precision-machined threads with tolerances of ±0.01mm, and must not be damaged by impact or by contamination, causing connection failure or leaks), sensors (which can have precision sensing elements that must not be damaged by impact or by vibration, causing inaccurate measurements), and pressure compensation (downhole tools operate at pressures up to 20,000 psi and temperatures up to 200°C, and must have pressure compensation systems that must not be damaged during transport). Our MWD/LWD and downhole tool cases use: thread protection (custom thread protectors (plastic or metal) for all threaded connections, and custom foam with zero-contact foam on thread surfaces), sensor protection (custom foam with zero-contact foam on sensor elements, and custom sensor protectors to prevent damage), pressure compensation protection (custom foam with zero-contact foam on pressure compensation components, and custom pressure compensation protectors to prevent damage), and corrosion protection (VCI bags or VCI foam for all carbon steel components, desiccant + humidity indicator cards for all sealed compartments, since downhole tools are often stored outdoors at drilling sites for 3-6 months before use). Subsea and offshore equipment (subsea trees, subsea manifolds, subsea connectors, umbilicals, ROVs (Remotely Operated Vehicles), AUVs (Autonomous Underwater Vehicles), offshore containers) are typically shipped as complete systems with connectors, sensors, control systems, and documentation. The most critical areas are: connectors (electrical connectors, hydraulic connectors, optical connectors, which can have precision-machined surfaces with tolerances of ±0.005mm, and must not be damaged by impact or by contamination, causing connection failure or leaks), pressure compensation (subsea equipment operates at pressures up to 5,000 psi (350 bar) in deepwater, and must have pressure compensation systems that must not be damaged during transport), and lifting points (offshore containers and subsea equipment must have certified lifting points that meet DNV 2.7-1 requirements, and must not be damaged during transport). Our subsea and offshore equipment cases use: connector protection (custom foam with zero-contact foam on connector surfaces, and custom connector protectors (plastic or metal) to prevent damage and contamination), pressure compensation protection (custom foam with zero-contact foam on pressure compensation components, and custom pressure compensation protectors to prevent damage), lifting point protection (custom foam with zero-contact foam on lifting points, and custom lifting point protectors to prevent damage), and corrosion protection (VCI bags or VCI foam for all carbon steel components, desiccant + humidity indicator cards for all sealed compartments, since subsea and offshore equipment is often stored outdoors at fabrication yards for 3-6 months before installation).

Case Design Specifications and OEM/ODM Capabilities

Our standard oil and gas equipment case specification includes: 2mm thick 5052-H32 aluminum panels (or 3mm for heavy-duty applications over 50kg payload, or 4mm for offshore containers that must meet DNV 2.7-1 requirements), Type II anodized (15-25μm) plus polyester TGIC powder coating (60-80μm) in matte black, gray, or custom color; continuous silicone gaskets (Shore A 50-60) providing IP65 sealing (IP67 available as option); 304 or 316 stainless steel hardware (latches, hinges, handles, rivets)—316 stainless steel is preferred for offshore and subsea applications, as it is more corrosion-resistant in saltwater environments; CNC-cut closed-cell XLPE foam (40-80 kg/m³, customer-specified density based on payload weight and fragility) with ESD-safe option (surface resistance 10^6-10^9 Ω/sq); heavy-duty draw latches (Southco or equivalent) with rubber bumpers; folding side handles (for cases over 15kg) or top handle (for cases under 15kg); stacking corners (recessed, for secure stacking); and a waterproof document holder (A4 size, inside lid).

Every oil and gas equipment case we build is custom-sized to your equipment’s exact dimensions, with CNC-cut foam cavities that hold each component in its operational orientation. We don’t sell stock cases for oil and gas equipment—because a 5mm gap means 5mm of potential movement during transport, and that’s where hydraulic valve damage, calibration drift, and corrosion start. Typical lead time is 15-25 working days for first article (including design, prototyping, and customer approval), then 20-30 working days for production batches of 10-100 units. MOQ is 5 units per design. Pricing depends on size, complexity, and certification requirements. A typical field instrument case (400×300×200mm, 5kg payload, calibration protection, ESD-safe foam, connector protection, IP65) ranges from $120-$200 FOB Changzhou. A typical wellhead control panel case (800×600×400mm, 50kg payload, hydraulic valve protection, gauge protection, calibration protection, IP65) ranges from $350-$600 FOB. A typical ESP controller case (1000×800×600mm, 100kg payload, power electronics protection, ESD-safe foam, connector protection, cooling system protection, IP65) ranges from $500-$900 FOB. A typical MWD/LWD tool case (2000×300×300mm, 50kg payload, thread protection, sensor protection, pressure compensation protection, corrosion protection, IP65) ranges from $400-$700 FOB. Volume discounts of 15-25% apply for orders over 50 units.