METALLIC EXPANSION  JOINTS
   
 
QUALITY   SPECS
Radiographic examination of welds. Size up to 9000 mm.
Ultrasonic examination of possible defects. Pressures from full vacuum to 200 bars.
Liquid penetrant examination of possible defects. Temperatures from cryogenic to 1250 c.
Magnetic particle examination of possible defects. End connections----flanged or welded ends.
Flurorescent penetrant examination. Material---- all grades of austenitic stainless
steel and high nickel alloys.
Mass spectrometer examination of leaks.    
Pneumatic pressure testing.    
 


 
  SINGLE
   
 
Single Untied Expansion Joints consist of a single
bellows element welded to end fittings-normally
flange or pipe ends. They can absorb small amounts
of axial, lateral, and angular movements with ease.
However adequate anchors and guides must be
provided.
   
Single Tied Expansion Joints also have one bellows. Except
that their length is restrained by the use of tie rods that
can accept pressure generated thrust. When under
pressure, they are usually not designed to accept any
axial movement, but can accept lateral movements.
   
  
  UNIVERSAL
   
 
   
 
Universal Untied Expansion Joints consists of 2 bellow
connected by a center spool piece with flange or pipe
ends. The universal arrangement allows greater axial,
lateral,  and angular movements that a single expansion
joint. Increasing the center spool length produces
increased movement capability. Like the single, adequate
anchors and guides must be provided.
   
The addition of tie rods to a Universal Bellows Assembly
adds design flexibility to the piping system in that they
carry the pressure thrust of the system, eliminating the
need for main anchors. However with the assembly tied,
the ability to absorb axial movements is lost. Only lateral
and angular movements can be absorbed with Tied
Universal Expansion Joints. Guiding system is still required.
 
ESSO (THAILAND)
Type: AUT Universal Tied A240-321 H
Size: 1,100 mm x 750 mm Length
Pressure: 0.77 bars
Temperature: 620 ํ C
Movement: lateral 20 mm, axial ± 18 mm
T P E
Type: Rectangular Metallic Bellow
Outer Dimension: 1,670 mm x 750 mm
Inner Dimension: 1,530 mm x 610 m
Temperature: 200 ํ c
Movement: Lateral 20 mm, axial ±25 mm
Polished to 250 µ
 
PTT CHEMICAL (NPC)
Customer Name: NPC
Type: AT Tied A240-316 (4 units)
Size: 18" x 450 Length
Pressure: 10 bars
Temperature: 60 ํ C
 
     
 
 
ALSO AVAILABLE
 
 
EXTERNALLY
PRESSURIZED
HINGED TYPE
GIMBAL TYPE
HIGH
TEMPERATURE
APPLICATION
REINFORCED
TYPE
INLINE PRESSURE
BALANCED
PRESSURE
BALANCED
ELBOWS