Piping Checklists; General Piping Checklist - Goulds Pumps 3700 Installation, Operation And Maintenance Manual

Piping checklists

General piping checklist

Precautions
CAUTION:
• Never draw piping into place by using force at the flanged connections of the pump. This can
• Vary the capacity with the regulating valve in the discharge line. Never throttle the flow from the
NOTICE:
Flange loads from the piping system, including those from the thermal expansion of the piping,
must not exceed the limits of the pump. Casing deformation can result in contact with rotating
parts, which can result in excess heat generation, sparks, and premature failure.
Piping guidelines
Guidelines for piping are given in the Hydraulic Institute Standards available from the Hydraulic
Institute at 9 Sylvan Way, Parsippany, NJ 07054-3802. You must review this document before
you install the pump.
Checklist
Check
Check that all piping is supported This helps to prevent:
independently of, and lined up
naturally with, the pump flange.
See Alignment criteria for pump
flanges.
Keep the piping as short as pos-
sible.
Check that only necessary fittings This helps to minimize friction losses.
are used.
Do not connect the piping to the
pump until:
• The grout for the baseplate or
sub-base becomes hard.
• The hold-down bolts for the
pump and the driver are tight-
ened.
Make sure that all the piping joints This prevents air from entering the piping system or
and fittings are airtight.
If the pump handles corrosive
fluids, make sure that the piping
allows you to flush out the liquid
before you remove the pump.
If the pump handles liquids at
elevated temperatures, make
sure that the expansion loops and
joints are properly installed.
Alignment criteria for pump flanges
Type
Axial
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Manual
impose dangerous strains on the unit and cause misalignment between the pump and driver. Pipe
strain adversely affects the operation of the pump, which results in physical injury and damage to
the equipment.
suction side. This action can result in decreased performance, unexpected heat generation, and
equipment damage.
Explanation/comment
• Strain on the pump
• Misalignment between the pump and the drive unit
• Wear on the pump bearings and the coupling
• Wear on the pump bearings, seal, and shafting
This helps to minimize friction losses.
leaks that occur during operation.
This helps to prevent misalignment due to linear expan-
sion of the piping.
Criteria
The flange gasket thickness is ±0.03 in. (0.8 mm).
Installation
Checked
29