What are API 6A Fasteners?
API 6A Fasteners are Industrial Engineering Works components used in high-pressure wellhead, Christmas tree, valve, and pressure-control equipment within the Oil & Gas industry.
API Specification 6A establishes requirements for wellhead and Christmas tree equipment used in upstream petroleum and natural gas operations. Fasteners used with this equipment must be selected according to the applicable equipment, material, dimensional, mechanical, testing, and documentation requirements.
API 6A fasteners are commonly used as closure bolting and other critical bolted connections where reliable performance under high-pressure service conditions is required.
API 6A Stud Bolt Features
High Tensile Strength
API 6A stud bolts are manufactured from suitable high-strength materials to provide the required mechanical properties for demanding bolted connections.
Corrosion Resistance
Suitable materials and available coating systems can provide resistance against corrosion according to the application and specified service environment.
High Pressure Performance
API 6A stud bolts are designed for applicable high-pressure bolting applications in wellhead, Christmas tree, valve, and pressure-control equipment.
API 20E Manufacturing
Where specified, API 20E requirements can be applied to the manufacturing, qualification, testing, traceability, and documentation of Industrial Engineering Works.
Heat Treatment & Testing
Applicable heat treatment and testing procedures are performed according to the specified material grade, product requirements, and project specifications.
Complete Material Traceability
Material identification and traceability are maintained to support verification of the supplied stud bolts and applicable manufacturing documentation.
Plant Maintenance & Shutdowns
Industrial Engineering Works supports maintenance, turnaround, and shutdown requirements with standard and custom fasteners manufactured to project specifications.
Applications of API 6A Stud Bolts
Available Product Types
Fully Threaded Stud Bolts
Fully threaded stud bolts provide continuous threading along the required length and can be supplied according to specified dimensions and thread requirements.
Tap End Studs
Tap end studs are available for applications requiring a threaded end configuration for installation into tapped components.
Double End Studs
Double end studs are supplied with specified threaded ends and an unthreaded center section according to the required configuration.
Continuous Thread Studs
Continuous thread stud bolts are available for applications requiring continuous threading along the specified length.
Custom Engineered Stud Bolts
Custom engineered stud bolts can be manufactured according to customer drawings, dimensions, materials, thread configurations, coatings, testing, and documentation requirements.
Available Materials
ASTM A193 B7
ASTM A193 Grade B7 alloy steel stud bolts for demanding high-pressure and high-temperature industrial and Oil & Gas applications.
ASTM A320 L7
ASTM A320 Grade L7 stud bolts for applications requiring specified mechanical properties and suitable performance at lower temperatures.
B7M
B7M stud bolts can be supplied for applications requiring the applicable material properties and service requirements specified by the project.
L7M
L7M stud bolts can be supplied for applicable low-temperature and Industrial Engineering Works requirements according to project specifications.
Alloy Steel
Alloy steel stud bolts are available for applications requiring specified strength, toughness, and mechanical properties.
Stainless Steel
Stainless steel stud bolts can be supplied for applications where corrosion resistance and material compatibility are required.
Duplex Stainless Steel
Duplex stainless steel stud bolts are available for demanding applications requiring a combination of mechanical strength and corrosion resistance.
Super Duplex
Super duplex stud bolts can be supplied for highly demanding environments where enhanced corrosion resistance and mechanical properties are required.
Quality Assurance
API Compliance
Products are manufactured and supplied according to applicable API specifications, material requirements, customer specifications, and project requirements.
Positive Material Identification (PMI)
PMI can be performed to verify the material composition of supplied stud bolts according to applicable requirements.
Ultrasonic Testing (UT)
Ultrasonic testing can be performed where required to identify applicable internal discontinuities and support product quality verification.
Magnetic Particle Inspection (MPI)
MPI can be performed for applicable ferromagnetic materials to identify relevant surface and near-surface discontinuities.
Mechanical Testing
Applicable tensile, yield, elongation, reduction of area, and other mechanical testing can be performed according to the specified material requirements.
Hardness Testing
Hardness testing is performed according to applicable material and product specifications.
Dimensional Inspection
Critical dimensions, thread characteristics, length, diameter, and other specified parameters are inspected to support dimensional conformity.
Third Party Inspection
Third-party inspection can be arranged according to customer, EPC, OEM, and project requirements.
EN 10204 3.1
EN 10204 3.1 certification can be provided where specified for material and product documentation.
Material Test Certificate (MTC)
Material Test Certificates are supplied where required to document material chemistry, mechanical properties, heat treatment, and traceability.
Specifications
| Specification | Details |
|---|---|
| Standard | API Specification 6A |
| API 20E | Applicable where specified |
| ASTM Grade | B7, L7, B7M, L7M & Other Applicable Grades |
| Diameter Range | Standard & Custom |
| Length | Standard & Custom |
| Thread Type | UNC, UNF, 8UN & Custom |
| Finish | Plain / As Specified |
| Coating | As Required |
| BSL Levels | BSL 1, BSL 2, BSL 3 where applicable |
| Temperature Rating | According to Material Grade & Application |
Why Choose Industrial Engineering Works?
Frequently Asked Questions
What is API 6A?
API 6A is an API specification covering wellhead and Christmas tree equipment used in petroleum and natural gas operations, including applicable requirements for equipment performance, manufacturing, testing, and related components.
What are API 6A stud bolts?
API 6A stud bolts are Industrial Engineering Works products used with applicable API 6A equipment such as wellheads, Christmas trees, valves, and pressure-control systems.
What is API 20E?
API 20E establishes requirements for bolting materials used in critical petroleum and natural gas applications. API 20E fasteners may be specified for applicable API 6A equipment.
What is BSL 1, BSL 2 and BSL 3?
BSL 1, BSL 2, and BSL 3 represent different Bolting Specification Levels under API 20E. The applicable level determines requirements related to qualification, manufacturing controls, inspection, testing, and documentation.
Which material is best?
The appropriate material depends on the equipment specification, pressure and temperature conditions, corrosion environment, mechanical requirements, and project requirements. Common grades include B7, L7, B7M, L7M, alloy steel, stainless steel, duplex, and super duplex.
What coatings are available?
Coating options depend on the application and customer requirements. Available options can include specified corrosion-resistant coating systems suitable for the intended service environment.
Do you provide MTC?
Yes. Material Test Certificates can be provided according to the applicable material specification and customer documentation requirements.
Do you export to the USA?
Yes. API 6A stud bolts and related Industrial Engineering Works products can be supplied to customers throughout the USA, along with worldwide export support.
What industries use API 6A fasteners?
API 6A fasteners are primarily used in Oil & Gas exploration, drilling, wellhead systems, offshore production, pressure-control equipment, and related upstream petroleum applications.
Can you manufacture custom sizes?
Yes. Custom API 6A stud bolts can be manufactured according to required diameter, length, thread, material, coating, testing, and customer drawing requirements.
Do you provide MTC?
Yes. Material Test Certificates can be provided according to the applicable material specification and customer documentation requirements.