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REV. STV20110519
APPENDIX A: Welding Guide
1. Placement of the valve housing
The valve housing is usually placed according to the figure below, but other locations may exist.
Therefore the relevant vessel drawings should be checked in order to determine the desired
location. Position the outlet of the valve housing according to the relevant drawing.
The distance from the valve housing weld seam to any other weld seam shall comply with the
local relevant standards regarding pressure vessels, if applicable. As an example, Figure 1 shows
the required distance according to the 1987 Swedish standards for pressure vessels, TKN 87
(minimum of three times for the thickness of the material of the dished end, 3 x t.)
Figure 1: distance between welds
Welding (TIG)
Cut a hole for the valve housing in the dished
end.
Grind the edge of the hole to prepare a suitable
weld gap.
Position the valve housing in the hole in the
dished end. Make sure that the valve housing
outlet is correctly oriented.
Valve size
Diameter of
weld flange (hole)
Sterivalve
®
12
ø 48 mm
Sterivalve
®
25
ø 79 mm
Sterivalve
®
38
ø 84 mm
Sterivalve
®
51
ø115 mm
Sterivalve
®
76
ø148 mm
