A105 Weld-Neck Flanges for Oil and Gas Projects
You need a flange that matches the project specification, not simply a familiar size in a catalogue. We help turn your A105 weld-neck flange requirement into a clear purchase configuration, with the bore, facing, material records and inspection scope connected to the same item.
Manufacturing enquiries with our team in ChinaSend your project details
One complete purchase designation
Your project specification is the starting point. Keep the material standard, grade, size, pressure class, facing and bore requirement together. We use that complete description to review the requested configuration, making missing fields and proposed deviations visible before you compare quotations.
- MaterialSpecified A105 requirement
- GeometrySize, bore and facing
- Project basisStandard edition and class
The bore follows the connected pipe
The nominal pipe size alone leaves important detail open. We need the pipe outside diameter, wall requirement and approved weld-end preparation to define the flange bore and connection. This gives your fabrication team a clearer fit-up basis and avoids discovering an interface difference after delivery.
Facing and drilling belong together
Two flanges with the same nominal size may still differ at the joint. We keep the required facing, drilling and mating component information in the review. Your gasket and bolting requirements remain part of the complete connection, rather than assumptions added after the flange has been ordered.
Catalogue reference. The approved specification defines the supplied configuration.Material identity stays with the item
A105 is a material requirement, while the finished flange still needs a defined supply configuration. We agree the material documentation and marking needed for your order. A stainless steel alternative is a separate technical proposal, never an automatic replacement for an A105 purchase line.
- RequirementExact material designation
- Supply reviewRoute and document scope
- TraceabilityItem linked to material records
Dimensions that support fit-up
Your receiving and fabrication teams benefit from measurements tied to the approved drawing. We agree the critical bore, weld end, facing and drilling checks before release. Results should retain their units and acceptance reference, so the inspection record can be read without reconstructing the quotation.
A rating reviewed in its proper context
A pressure class is part of a standardised configuration, not a stand-alone promise for every operating temperature. We retain your project design basis and identify any rating questions for technical review. The agreed inspection scope follows that specified item rather than a generic high-pressure label.
- Design basisMaterial and service conditions
- ConfigurationStandard, edition and class
- AcceptanceApproved project requirements
- RecordTraceable inspection output
Clear decisions between your team and ours
You provide the approved piping requirements and identify the engineering authority. We review the supply configuration and state any exceptions. Together, we close the dimensional, document and inspection points before the commercial order is released, keeping the quotation aligned with the design you intend to build.
- YouApprove the project requirements
- WeDefine supply scope and exceptions
- TogetherClose the technical baseline
An orderly route from dispatch to receipt
The flange reference, material identity and agreed records should remain connected through packing and receipt. We align the identification and protection requirements with your order. For repeat purchases, the approved configuration remains the baseline, with changes brought back for review before substitution.
A clear start for your quotation
Send the applicable standard and edition, material requirement, NPS or DN, connected pipe dimensions, class, facing, quantity and inspection needs. Include your project item number and drawing revision so we can return a configuration-based quotation with open points clearly separated.
Send your project details- SendDrawing, item list and requirements
- ReviewConfiguration, open points and records
- AgreeTechnical scope and commercial basis
