Applications
- Pipeline stations and terminals
- Refinery and petrochemical piping
- Gathering, flowline and process interconnections
PIPELINE COMPONENTS
Pipe Fittings & Flanges
Matching fittings and flanges organized around the governing piping specification, material class and project package.
StandardASME B16.5 · ASME B16.9
Size / supply rangeButt-welding fittings from standard and project-specific schedules · Forged socket-weld and threaded fittings
Grades / materialsCarbon and low-alloy steels · Stainless and duplex stainless steels
Connections / optionsButt-weld, socket-weld and threaded ends · Raised-face, ring-type-joint and other specified flange facings
TECHNICAL PROCUREMENT
Define pipe fittings & flanges around the operating requirement.
Availability and final supply scope are confirmed after technical review. OAK PIPE coordinates the product configuration, manufacturing route, inspection requirements and delivery package against the enquiry.
Configuration options
- Elbows, tees, reducers, caps and branch fittings
- Weld-neck, blind, slip-on and selected special flanges
- Carbon, low-alloy, stainless, duplex and clad material routes
Quality & documentation
- Material and heat-treatment traceability
- Dimensions, end preparation and flange-facing inspection
- Mechanical tests, NDT, PMI and pressure testing when specified
PROCUREMENT BASIS
Technical scope at a glance.
This summary supports preliminary comparison. Final dimensions, tolerances, availability and acceptance requirements are confirmed against the enquiry and governing purchase documents.
| Reference basis | ASME B16.5, B16.9, B16.47, MSS standards and project-specific material and piping-class requirements |
|---|---|
| Product configuration | Elbows, tees, reducers, caps and branch fittings · Weld-neck, blind, slip-on and selected special flanges · Carbon, low-alloy, stainless, duplex and clad material routes |
| Verification basis | Material and heat-treatment traceability · Dimensions, end preparation and flange-facing inspection · Mechanical tests, NDT, PMI and pressure testing when specified |
| Commercial confirmation | Size or drawing · Material / grade · Quantity · Service conditions · Inspection scope · Destination and schedule |
The purchase order, approved drawings and agreed specification take precedence over this website summary.
RFQ CHECKLIST
Information to include with your enquiry.
A clear starting specification allows faster technical review and a more accurate commercial response.
Prepare Your RFQ- 01Item list, sizes, ratings and quantities
- 02Material grade, schedule and piping class
- 03Facing, end preparation and dimensional standard
- 04Service, NDT, coating and document requirements
PRODUCT OVERVIEW
Pipe Fittings & Flanges for project-specific requirements.
Pipe fittings and flanges connect, branch, reduce, terminate and provide removable joints within pipeline and process-piping systems. A complete requirement must identify the exact component type, nominal size, schedule or wall, pressure class, material grade, dimensional standard, facing or end preparation and governing piping class.
Current public ASME references include B16.9-2024 for factory-made wrought butt-welding fittings, B16.5-2025 for flanges and flanged fittings through NPS 24, and B16.47 for large-diameter steel flanges. Material standards, pressure-temperature ratings and project requirements must be coordinated rather than inferred from component dimensions alone.
OAK organizes matching materials, heat treatment, dimensions, NDT, PMI, surface protection, marking and documentation for consolidated pipe-component packages.
TECHNICAL SCOPE
Supply basis at a glance.
Use this overview to prepare an enquiry. The final size, grade, connection and inspection combination is confirmed against the governing specification.
| Technical field | Available or review basis |
|---|---|
| Standards | ASME B16.5 · ASME B16.9 · ASME B16.11 / B16.47 where applicable · Applicable ASTM / ASME material specification · Project piping class |
| Size & supply range | Butt-welding fittings from standard and project-specific schedules · Forged socket-weld and threaded fittings · Flange sizes and pressure classes according to selected standard |
| Grades & materials | Carbon and low-alloy steels · Stainless and duplex stainless steels · Selected nickel alloys and clad routes |
| Connections & options | Butt-weld, socket-weld and threaded ends · Raised-face, ring-type-joint and other specified flange facings · Weld-neck, blind, slip-on and selected special flange types |
PRODUCT PARAMETERS
Recorded product specifications.
The values below come from the maintained OAK product record. Contract dimensions, tolerances and acceptance criteria remain subject to final order review.
| Parameter | Specification / value |
|---|---|
| Dimensional standards | ASME B16.5, B16.9, B16.11 and B16.47 as applicable |
| Product range | Elbows, tees, reducers, caps, forged fittings and flanges |
| Selection basis | NPS, schedule or bore, pressure class, material, ends and piping class |
APPLICATIONS
Where this product is used.
- Pipeline stations and terminals
- Refinery and petrochemical piping
- Gathering and process systems
- Equipment and pipe interconnections
SERVICE & SELECTION
Conditions considered during selection.
- Pressure-temperature rating
- Corrosion and sour-service requirements
- Low-temperature toughness
- Cyclic, external and piping-system loads
MANUFACTURING
Controlled production route.
Key operations are coordinated against the product specification and order requirements.
01Forging, forming or approved fabrication route
02Heat treatment
03Machining of ends, bores and facings
04Surface treatment and coating
05Final marking and preservation
INSPECTION & TESTING
Verification before release.
- Material verification and PMI when specified
- Mechanical and hardness testing
- Dimensional, facing and end inspection
- UT, MT or PT as ordered
- Pressure testing where applicable
QUALITY DOCUMENTS
Evidence supplied with the order.
- MTC
- Heat-treatment and mechanical-test reports
- NDT / PMI reports
- Dimensional and facing inspection
- Certificate of conformity
PACKING & DELIVERY
Prepared for the destination and handling plan.
Marking, protection and shipment details are confirmed during order review.
Facing and bevel protection
Item-level marking
Crated or skid-mounted export packing
Segregation by material and piping class
RFQ CHECKLIST
Information needed for a practical quotation.
Share the available technical and commercial requirements. Missing details can be reviewed with our team.
Request a Quote- 01Item description, quantity and dimensional standard
- 02Size, schedule, bore or pressure class
- 03Material grade and piping class
- 04Facing, end preparation and coating
- 05Service, testing, documentation and destination
PRODUCT & PROCESS VIEWS
Product views and manufacturing context.
Representative product, production and inventory views support preliminary identification. Final supply details are confirmed against the quotation.
START A CONVERSATION
Have a specification or product list?
Send it to OAK PIPE for technical and commercial review.