Heirs Oil & Gas Approved Separator Suppliers: What the Standard Really Requires

Heirs Oil & Gas is one of Nigeria’s fast-growing indigenous energy companies, with upstream production and midstream infrastructure interests including onshore and shallow-water assets in the Niger Delta. When a project’s separator vessels are ultimately destined for a Heirs Oil & Gas facility, “approved supplier” isn’t a marketing phrase — it’s a specific, audited status the client grants to individual manufacturers after a formal qualification process. For procurement and engineering teams in Italy sourcing separators for this kind of work, understanding what that process actually involves is far more useful than searching for a badge.

This article explains what Heirs Oil & Gas vendor approval covers, the engineering baseline it’s built on, and what to look for when qualifying a separator manufacturer for Heirs Oil & Gas-linked or -grade projects.

What Heirs Oil & Gas Vendor Approval Actually Means

Heirs Oil & Gas maintains its own vendor qualification process, which involves a detailed review of a manufacturer’s quality management system, welding procedures, plate and material control, non-destructive testing capability, and documented fabrication history. That review is typically carried out by the client’s own engineering and inspection teams, or by a third-party inspection agency acting on its behalf, and the resulting approval is specific to the manufacturer and the equipment category involved.

Because this status is granted directly by Heirs Oil & Gas to a named manufacturer, it isn’t something any supplier can claim without going through that process. What buyers researching suppliers can assess independently — before any formal audit — is whether a manufacturer’s engineering and quality practices are already built to the level Heirs Oil & Gas requires.

The Engineering Baseline Behind Heirs Oil & Gas-Grade Separators

Regardless of a separator’s final destination, the technical requirements that underpin Heirs Oil & Gas-grade fabrication are largely the same requirements that govern quality two-phase and three-phase separator manufacturing generally, with the added considerations typical of onshore and shallow-water upstream production:

Design Codes

ASME Section VIII (Divisions 1 and 2) is the standard reference code for the pressure-containing shell, with internal separation elements — demister pads, coalescing plates, vortex breakers, and weir configuration — designed according to recognized separation engineering practice, and client engineering standards layered on top for upstream production projects.

Material Traceability

Full mill test certificates and heat-number traceability carried from raw plate through to the finished, welded separator shell and internals, including sour-service material certification where required.

Shell and Internals Engineering

Design that accounts for internal pressure, wind and seismic loading, flow-induced vibration, and support saddle or skirt design, verified through calculation packages and, where required, finite element analysis.

Welding Procedure Qualification

WPS and PQR documentation, with welders individually qualified under ASME Section IX.

Non-Destructive Testing

Radiographic or ultrasonic testing of shell welds, along with magnetic particle and dye penetrant testing of nozzles and support attachments.

Hydrostatic Testing

A full pressure test of the assembled separator vessel before commissioning, carried out at the mandated test pressure with documented hold times.

Third-Party Inspection

Hold-point sign-off from an accredited inspection body such as Lloyd’s Register, Bureau Veritas, TÜV, or DNV at critical stages of construction.

A manufacturer that applies this level of control as standard practice — not only on projects with a named end client — is generally the one positioned to succeed if and when a formal Heirs Oil & Gas audit takes place.

Where Notdstone Fits

Notdstone manufactures customized separators and process equipment for demanding oil and gas processing applications, serving Italy, the GCC, and international markets, with more than three decades of engineering experience across the team. Our fabrication and QA/QC processes are structured around the technical baseline described above — documented material traceability, ASME IX-qualified welding, comprehensive NDT, and hydrostatic testing before delivery.

To be clear with buyers researching this topic: formal vendor approval with Heirs Oil & Gas is issued directly by Heirs Oil & Gas to specific manufacturers following its own review process, and we’re not claiming that status here. What we can speak to with confidence is the engineering rigor our separators are built to on every project. Our separator and column fabrication work follows this same baseline, whether or not a project names a specific end client.

FAQ

What does “Heirs Oil & Gas approved” mean for a separator supplier?

It means the manufacturer has been formally reviewed and accepted by Heirs Oil & Gas, covering their quality system, welding procedures, and testing capability for separator fabrication.

What design code applies to Heirs Oil & Gas-linked separators?

ASME Section VIII is the primary reference code for the pressure-containing shell, often supplemented with the client’s own engineering standards for upstream oil and gas projects.

Do Heirs Oil & Gas-grade separators require special materials?

For sour service, high-pressure production streams, or corrosive process fluids, yes — corrosion-resistant internals, coatings, or specialized alloys may be specified instead of standard carbon steel.

Can a manufacturer outside Nigeria supply Heirs Oil & Gas-linked separators?

Yes, provided their code compliance, material traceability, and third-party inspection arrangements meet the project specification and export logistics support delivery of the vessel to the project site.

How can I verify a supplier’s vendor-approval claim?

Ask for written confirmation of the approval status and its exact scope — which equipment categories it covers — rather than relying on a general claim.

Working With Notdstone

If your project requires separators engineered to ASME standards and manufactured under documented quality control, our engineering team can review your process requirements and provide a project-specific proposal. Get in touch with Notdstone to discuss your requirements.