Pipe Fitting By Dee Ess Industries

Pipe Fitting:

Male 45o Elbow




Inch

1/2

3/4

1

1.1/4

1.1/2

2



mm

15

20

25

32

40

50



a

22

25

28

33

36

43





Quality Control:
To control and maintain the required quality, the following tests are performed.

Chemical Testing:

Raw material such as pig iron, steel scrap and
zinc are tested for their required chemical compositions prior to
melting, in a well equipped testing laboratory.Raw castings are chemically tested for the required chemical compositions.Galvanized casting are tested to ensure that the zinc coating is not less than the specified 610 gms/m2 as per IS: 4759.
Visual Inspections:

Raw casting are subject to strict visual
inspections to ensure that they are sound, clean, free from porosity,
blow holes, hard spots, cold shuts, distortions, misrules and sand
drops etc.Annealed, granddad and shot blasted casting are inspected for cracks and distortionsGalvanized casting are inspected to ensure that
the zinc coatings is smooth, clean, free from acid spot, black spots
and pimples.Thread inspections are carried out to ensure that
the machined fittings are free from defects on threaded portions such
as thin threads, broken thread and pin holes.
Mechanical Tests (By Sampling Method):
To ensure that the fitting have acquired the requisite properties, the following test are performed

Malleability Test: To ensure that the fittings have acquired proper malleabilityTensile Test: To ensure that the fittings are annealed and have attained the required strength and elongation.Pressure Test: To ensure that the fitting are leak proof when subjected to internal fluid and air pressure.
Meteorological Inspections:
Meteorological
inspection is done to ensure that the fittings have acquired correct
alignment, overall diameters, wall thickness with the help of suitable
thread gauges and micrometers etc.