View
839
Download
0
Category
Tags:
Preview:
Citation preview
Titan®
Superior Bolting Solutions®
Profile
Profile
Titan Technologies is based in Houston Texas. Titan is the fastest growing company in the bolting products industry with offices worldwide.
Titan Products and Services are provided Worldwide into the Power Generation including Wind and Heavy Industry sectors such as Defense, Marine, Mining, Offshore, Paper, Petrochem, Power, Quarrying, Refining, Steel and Sugar.
Our client list includes; ABB, AES, Alcoa, Alstom, ANI, Bellelli, BP, BHP Steel, Boral, CME, CSR, Dresser, EDF, FP&L Energy, Exxon-Mobile, Flour Daniels, Furmanite, Jaques, Macquarie Generation, MIM, Mitsubishi, Pacific Power, QCL, QNI, Saipem, Svedala, TEAM, Thiess, Toshiba, Upwind, etc…….
Titan®Superior Bolting Solutions®
Worldwide
Worldwide Agency Network
Titan Offices
Local Sales & Service
•Differential expansion leads to thread galling
•Long heating times
•Heat transfer into casing
•Long cooling periods - bolts & casings
•Bolt / element damage
•Safety
Average time per casing: 24-36 hrs
•No torsional stresses•Angle of rotation can be accurate
(for casings with no distortion)
The Old Method
No torsional stresses
Accurate
Fast
Repeatable
Safe
Average time per casing: 3-5 hrs
The New Method
Hi Temp Hydraulic Nut
• The Titan High Temperature Hydraulic Nut is a precision engineered, high pressure, high performance, hydraulically operated axial bolt tensioning device
• The Titan High Temperature Hydraulic Nut is suitable where;– accurate and reliable loading is required
on bolting
– vibration or torsional stresses are a problem
– regular maintenance requires repeated adjustment or removal of nuts
– confined or difficult access, where manual operation can lead to safety problems
Hi-Temp Hydraulic Nut
Spherical Washer designed to self-correct seating & bolting mis-alignment
Spherical Washer designed to self-correct seating & bolting mis-alignment
Piston with external buttressed screw-thread for Locking Ring
Piston with external buttressed screw-thread for Locking Ring
Locking Ring, to retain LoadLocking Ring, to retain Load
Nut body, which screws onto the Bolt using purpose designed screw-thread
Nut body, which screws onto the Bolt using purpose designed screw-thread
Nut body incorporates high-pressure threaded connections for power oil
Nut body incorporates high-pressure threaded connections for power oil
High Pressure seals contained within Nut body
High Pressure seals contained within Nut body
HiTemp Hydraulic Nut
High Pressure power oil Inlet connection
High Pressure power oil Inlet connection
High Pressure power oil inlet connection floods the sealed chamber
High Pressure power oil inlet connection floods the sealed chamber
High Pressure power oil Outlet is sealed
High Pressure power oil Outlet is sealed
HiTemp Hydraulic Nut
High Pressure power oilHigh Pressure power oil
Piston and Nut Body apartPiston and Nut Body apart
HiTemp Hydraulic Nut
High Pressure power oilHigh Pressure power oil
Piston and Nut Body apartPiston and Nut Body apartThe bolt is stretched
accurately so applying the required tension, and providing the desired compressive force.
The bolt is stretched accurately so applying the
required tension, and providing the desired compressive force.
Hi Temp Hydraulic Nut
High Pressure power oilHigh Pressure power oil
Piston and Nut Body apartPiston and Nut Body apart
Hi Temp Hydraulic Nut
Hi Temp Hydraulic Nut
Threaded Locking Ring, mounted on Piston, is screwed hand-tight up to the Nut-body, to retain the induced load tension in the bolt.
Threaded Locking Ring, mounted on Piston, is screwed hand-tight up to the Nut-body, to retain the induced load tension in the bolt.
Pressure is released, and oil can be extracted for high temperature applications.
Pressure is released, and oil can be extracted for high temperature applications.
Hi Temp Hydraulic Nut
Hi Temp Hydraulic Nut
Full Load is applied to Locking Ring
Full Load is applied to Locking Ring
Hi Temp Hydraulic Nut
When oil is removed, tightening operation is completed by removing High Pressure system, and glands from Nut-body.
When oil is removed, tightening operation is completed by removing High Pressure system, and glands from Nut-body.
Hi Temp Hydraulic Nut
When oil is removed, tightening operation is completed by removing High Pressure system, and glands from Nut-body.
When oil is removed, tightening operation is completed by removing High Pressure system, and glands from Nut-body.
Hi Temp Hydraulic Nut
The Hydraulic Nut is removed, by the reverse process, which unloads the Locking Ring, allowing easy removal of the Nut-body assembly
The Hydraulic Nut is removed, by the reverse process, which unloads the Locking Ring, allowing easy removal of the Nut-body assembly
No major physical force, large wrenches or torque tools are required to correctly fit and remove the
Hydraulic NUT
No major physical force, large wrenches or torque tools are required to correctly fit and remove the
Hydraulic NUT
Hi Temp Hydraulic Nut
Hi Temp Hydraulic Nut
32 x 1 ¾” HiTemp Hydradraulic Nuts – tensioned in less then 2 hours!!
Hi Temp Hydraulic Nut
• Titanproducts also manufactured
in ;
– Hydraulic Bolt & Hydraulic Washer configurations
– These incorporate the same precise tensioning features, and user benefits as do the well-proven
Hydraulic Nut– Components can be supplied in a
wide range of sizes and materials, as well as incorporating protective covers for service in abrasive or corrosive conditions
HydraBolt
HydraWasher
HiTemp Hydraulic Nut
The size and pitch separation of the Bolts and Studbolts used in
securing Turbine casings does not permit
the use of regular tooling.
Bolting is generally carried out by thermal
elongation of the stud & measuring to check
elongation.
Restrictive Area High Load Requirement
Minimal Stud Protrusion
Height restrictions in some positions
ChallengesHi Temp
Hydraulic Nut
CASING Spot Face
•Standard turbine bolting
•Note closeness of bolting
•Note amount of bolt stand out from spot face
ChallengesChallenges
CASING Spot Face
Slimline Bridge
•Attempted solution is to reduce nut diameter thus making room for the tensioner reaction bridge within the spot face area
Reduced Nut
This creates a problem: The nut to casing contactarea is greatly reduced, thus increasing contact stresses to unacceptable levels
Attempted SolutionsAttempted Solutions
CASING Spot Face
ThickWasher
Slimline Bridge
Reduced Nut
To overcome this problem a thick washer is used;thus maintaining the casing contact stress area
This however means bolt has to be made longer!!
Attempted Solutions
CASING Spot Face
ThickWasher
Slimline Bridge
Reduced Nut
The bolt has also to be made longerto accommodate the tensioner
IT IS OBVIOUS THIS SYSTEM REQUIRES A CHANGE OFBOLTING, OFTEN A COST PROHIBITVE SOLUTION
Attempted SolutionsAttempted Solutions
FEA
BOLT
NUT
CASING Spot Face
•Standard turbine bolting
•Another long standing problem on traditionalbolting is the high stress concentration in the first thread fillet. Most bolts suffer stress crackingfatigue in this area and is where they rupture
More Problems!The challenges
CASING Spot Face
Tapered threads on the Bolt as adopted byWestinghouse, MHI, etc....
Tapered threads on the nut as adopted byGE, Toshiba. etc....
These are the attempted solutions for better distribution of stress in the threads
Attempted Solutions
SOLUTIONS WHICH HAVE BEEN PROVEN COMPLETELY INEFECTIVE
Attempted Solutions
CASING Spot Face
Slide on outer cone of nut
Screw on inner cone nut
Slide on tensioner bridge
Machine taper thread in bolt
Screw on one piece tensioner
No Stud Replacement
Nut to casing contactstress area is maintained as per the original nut
The Solution!!The Solution
The Critical InterfaceNote the smooth & even distribution of load from the high strength puller to the studboltNo part of the studbolt is overstressedPuller stud loads do not exceed allowable maximum
F.E.A.The Solution
STRESS IS DECREASED ACROSS THE SECTIONAL AREA
Stress
THE MODIFIED STUDBOLT HAS A BETTER DISTRIBUTION OF STRESS THAN STANDARD
SECTION 1
SECTION 2
2601.4
2441.0
The Solution!!
Load is transferred
from each thread,
through the cone
interface, down to
the nut to casing
contact area
Longer Bolt Life
No Thread Distortion
Dramatically less creep induced failure
Disassembles easily
Outer Cone provides stable platform for HydraJac Tensioner
Gives evenly distributed compressive load across the spotface
SUPERIOR CONE NUT CHARACTERISTICS
Benefits
CASING Spot Face
Apply Oil Pressure
Note both oil chambers now under pressure
Also note bolt is now stretched
And outer part of nut is clear frominner part
The Titan Solution!
CASING Spot Face
Tighten inner part of nut until it is snug with the outer cone
The Titan Solution!!
CASING Spot Face
Release oil pressure
The Titan Solution!!
CASING Spot Face
And unscrew the tensioner from the bolt
TheTitan
Solution!
CASING Spot Face
Screw in protection plug
The Titan Solution!
Testing
Solutions
Multiple Cell Tensioner High Force Output
Standard Stud Protrusion High Temperature Nut
Superior Bolting Solutions:
SolutionsSuperior Bolting Solutions:
Hi Temp Hydraulic
Nut
High Temperature Nuts / Tensioners:
IP Inner
Valve Cover
IP Outer
Applications
Where Else?
Turbine Casings, Loop Pipes, Valves, Boiler Feed Pumps, High Pressure Feed heaters, Boiler Circulation Pumps, Inner Casings, Outer Casing, Inlets, Crossovers, Outlets Steam Chests…….All
criti
cal B
olting
Applications
Superior Bolting Solutions®
Thank You
Any Questions?
Recommended