CORROSION, PAINTING & BLASTING qc inspection services with
experienced inspector on call
1. Inspection check list for fans qc inspection services
The number of inspection visits will be determined by the Area
Manager and will vary according to the size and complexity of the
equipment ordered. qc inspection services of fans will include the
Visual examination of all welding and witness of NDT required by
Dimensional check of important features e.g.
If the design incorporates shaft gland packing to ensure that these
are in accordance with Specification, check shaft and keyway
If the drive unit is not furnished with the fan then check the
machined dimensions of the coupling and direction of rotation,
which should be plainly marked.
If the fan is furnished complete with drive unit, then this unit
must be fully inspected unless this has already been carried out at
the driver's supplier works. Check that power requirements meet the
If the fan is fitted with a pressure lubrication system, then
particular care must be taken to ensure cleanliness of the complete
Witness running test in accordance with detailed Specification,
also the balancing of rotors at rated speeds and powers.
Check noise levels and obtain records.
Check cleaning and painting as required by Specification.
Check the maker's nameplate carried all required data.
Check field assembly markings and instructions.
Fans are normally employed when there is a requirement to move
large volumes of air or gas at very low-pressure differentials.
Typical uses are for ventilation work, cooling circuits, fume
extraction, to provide draft to boilers and furnaces, air drying,
cooling towers etc.
The "fan" definition is normally employed when the change in the
gas specific weight between inlet and outlet is less than 7%. If
this percentage is exceeded, then the equipment is normally classed
as a compressor. Fans, therefore, are normally used in systems
where a pressure-head of less than 0.5 psig is required. Fans may
have straight, forward, or backward curving blades - axial flow
fans may be of the hub-mounted propeller type or of disc with
fitted blade construction.
Fan casings are generally constructed from comparatively
lightweight steel plating, since little or no pressure containment
is required - the principle requirement being to provide a rigid
construction to reduce vibration and subsequent noise levels, so
far as practicable. Fans are normally purchased complete with
driver - usually electric motors although steam or gas turbines may
be employed in larger units or when variable flow is required.
3. PREPARATION FOR SHIPMENT after qc inspection services
Ensure that all equipment is marked, prepared and securely packed
for transportation and shipment.
Check that cases are clearly marked for identification on site,
with dimensions and weights. (Particular value for ducting and
hangers) Check that all necessary documentation is available.
|Pre-Shipment Inspection (PSI)|
Production Monitoring (PM)
During Production Check (DUPRO)
Initial Production Check (IPC)
Lab test witness
Daily, weekly, monthly or per customer requirement
English report or per customer request
Report will be submitted within 48 hour after inspection finished
4. Our advantages
To ensure the quality and delivery of the goods to customers, INF
provide professional qc inspection services, all quality assurance
inspector are with at least 5 years related working experiences and
all requested qualifications.
Our qc inspection services network cover most area of china,
inspector can attend the inspection upon customer's notification
within 24 hours.
qc inspection services/ qc inspection services for steel products/
qc inspection services for Fans