Spirax Sarco STS17.2, Installation And Maintenance Instructions Manual

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IM-P128-23 ST Issue 6 11
Parent material temperature
Preheat temperature
Only required when ambient is below 5 ° C
(41 ° F), then "warm to touch"
Interpass temperature
Not applicable
Post-weld
heat treatment
None required
Run sequence and completed
weld dimensions
Sketch
Reference.- BS 806: 1990: Section 4: Clause 4.7.3
lll
1.4t minimum
1.4t minimum
This edge
not to be completely melted away
Pipe
3.10.1 Welding of an STS17.2 steam trap station
The welding of an STS17.2 steam trap station ½", ¾" and 1" socket weld
to a 15 mm, 20 mm or 25 mm Schedule 40 pipe
Weld preparation
Dimensioned sketch
Diametrical clearance 1.0 mm maximum
Reference - BS 2633: 1987: Section 3.1 and Fig. 9
Welding process
Manual Metal Arc (MMA)
Welding positions(s)
All: Site welded
Welding consumables
Filler material:
Composition - Low C: 23% Cr: 12 % Ni:
Specification - BS 2926: 1984: 23-12 L BR
Shielding gas/ flux:
Not applicable
Method of preparation and
cleaning
Socket: As supplied and wire brushed
Pipe: Mechanically cut and wire brushed
Additional information
1. See Section 3.7, page 9.
2. Fit-up using tack welds.
t
STS17.2
Pipe
1.5 mm approximately
Parent materials(s) dimensions
Thickness O/D
(mm) (mm)
½ " STS17.2
5.15 32.00
Pipe 2.76 21.30
¾ " STS17.2
5.00 37.00
Pipe 2.87 26.70
1" STS17.2
5.60 45.00
Pipe 3.38 33.40
Pipe is to be BS 1600 Schedule 40
Parent materials(s)
Description
Austenitic stainless steel with minimum tensile
strength up to and including 485 N/mm ²
Specification(s)
ASTM A182 F316L (STS17.2)
ASTM A106 Gr. B (Pipe)
Material group(s)
R
A1
Joint type
Socket joint to BS 3799 Class 3000 lb
STS17.2
3.9.2
Select a quickfit connector steam trap suitable for the application and fit to the
STS17.2 using the guidance provided within the Installation and Maintenance
Instructions provided with the steam trap.