01
ASTM A193
High temperature and pressure
Specification for alloy steel and stainless steel studs and fasteners used in high-temperature and high-pressure service.
Grades covered
- B7
- B6
- B5
- B16
- B8 · Class 1 and 2
- B8M · Class 1 and 2
ASTM A193 · ASTM A320
Industrial stud bolts
for demanding flanged joints
Alloy or stainless steel stud bolts for pressurised systems and high or low temperature conditions.
Stud bolts
Service families
High and low temperature
A320
Selection by service
Two specifications for different thermal conditions.
Grade, material and class must be defined according to the system specification and the real service conditions.
02
ASTM A320
Low-temperature service
Specification for alloy steel and stainless steel studs and fasteners used in low-temperature service.
Grades covered
- L7
- L43
- B8 · Class 1 and 2
- B8M · Class 1 and 2
Surface protection
Available coatings.
The choice of finish must take into account the stud material, the service conditions and the assembly procedure.
- 01
Black oxide
Technical black
- 02
Galvanized
Zinc protection
- 03
Fluoropolymers
Low friction
- 04
PTFE
Controlled finish
- 05
Zinc flake
With or without aluminium
Flanged joint assembly
Controlled manufacturing for reliable assembly.
The quality of a stud bolt depends on compliance with our manufacturing procedures. For assembling bolted joints in pressurised systems, we recommend following the ASME PCC-1 guidelines.
- 01
Uniform load
The assembly procedure should aim for a uniform clamping load across the flanged joint.
- 02
Seal integrity
Tightening sequence and control help preserve the performance of the gasket.
- 03
Operational reliability
The quality of the stud must be matched by a proper installation procedure.
Selection support
Three points worth defining before requesting the assembly.
- 01
Review point
Installation and torque
Review of questions about stud installation or torque in line with ASME PCC-1.
- 02
Review point
Coating selection
Definition of the right finish for the service conditions and the technical requirement.
- 03
Review point
Nuts and washers
Selection of the matching elements for each flanged joint.
Technical support
Secure the integrity of your flanged joints with the right stud bolt
Share the grade, diameter, length, thread pitch, coating, quantity and service conditions. Our team will review the requirement.