HIGH PRECISION & PRESSURE PIPE _ FUEL PIPE SERIES

Synopsis of process flow:

Using high quality raw material: ST35,ST37 ST37.4 ST52.4, cold drawn, anaerobic bright heat treatment, nondestructive examination.

Applicable standard:

IS08535-1 (steel tubes for high pressure fuel pipe in compression ignition engine), IS00404-1992 (technical requirements for steel and steel product), IS06892-1984 (tensile testing for metal).

Main feasure:

High precision, excellent brightness, after heat treatment, steel tube inside and outside wall have no oxide layer, high cleanness inner surface, flushing the inner diameter, anti-rust oil painted. Total impurity<1.5mg/g. Maximun granule 8 degree(^0.2mm). Under high pressure, no deformation after cold bending, the complicated geometrical forming and machining can be realized. Color of the tube: gray with white. The tolerance for OD and ID: ±0.05mm，high inner surface quality level for Q. Normal working pressure is 2000 kg, and test pressure reached 6000 kg without deformation. Steel tube around a circle and its outer diameter of the same diameter rod cold bending 180 °, the surface is smooth, no cracks.

Main application:

For high pressure fuel pipe in compression ignition engine, all technical requirements can reach the level of top international brand, and they are able to replace the imported tubes and reduce the cost for our customers.

SPECIFICATION LIST

Application

1. Automotive and mechanical pipes

2. Petroleum cracking pipes

3. High Pressure Boiler Pipe

4. Low and middle pressure fluid transportation pipeline

5. Chemical fertilizer equipment pipes

6. Heat exchanger pipes

Production equipment

1. COId Drawn Machine Cold drawing machine as the main processing
equipment of cold drawn steel tube, it is the
production of small, precise and thin wall, high
mechanical properties of pipe of the main
processing equipment.

2. High oressure washing Dlatform
High pressure washing platform is
used for out and inner surface
cleaning.

3. Anaerobic annealing lurance
Annealing is a kind of metal heatina treat-
ment process, refers to the metal slowly
heated to a certain temperature, keep en-
ough time, and then cooling at appropriate
rate. The purpose is to reduce the hardness
and improve cutting machining,eliminate
the residual stress, stable size, reduce the
deformation and crack tendency,fine grains,
adjust, eliminate defects.

4. Straightening Machine
Straightening machine is the equipment
which be used for steel pipe straightening;
After straightening steel pipe surface no
indentation, necking phenomenon, better
than the standards set by the Ministry of
construction.

5. Polishing Machine
Polishing machine is used for polishing,
derusting, dusting, descaling; make the
surface of steel pipe bright.

Testing equipment :

1. Chemical analysis instruments
Chemical analyzer is mainly used in
measurement ot element com
positon  in steel fiel Accurate anal n
detection o alloy elements xnä hoy
identification.

2. Optical spectrum analyzes
Used in the detection of steel pipe’s
quality

3. Eddy current detector
Eddv current detector is used for
testina that steel pipe whether have
defecrs.

4. Mechanical tester
Used for testing steel pipe’s physical and
mechanical properties.

5. ROCkwelI hardness tester
Rockwell hardness tester used to test
the hardness of steel pipe surface.

APPLICATIONS:

THE PRODUCTION PROCESS: