Jiangsu Hongbao Group Co., Ltd.
Jiangsu Hongbao Group Co., Ltd. Manufacture since 1958
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E155,E195,E235,E275,E355 EN10305-2 Hollow Steel Tube Welded Cold drawn Precision Steel Tubes
Description:
| End Shape |
Beveled end, plain end, vanished, or adding plastic caps to protect the two ends as per customer's requirements |
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Surface Treatment |
Oiled, Galvanized, Phosphate etc | |
| Technique | Cold drawn & cold rolled | |
| 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 | ||
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Delivery Conditions |
1. BK (+C) | No heat treatment after last cold forming process. |
| 2. BKW (+LC) | After last heat treatment there is a light finishing pass (cold drawing) | |
| 3. BKS (+SR) | After the final cold forming process the tubes are stress relieve annealed. | |
| 4. GBK (+A) | After the final cold forming process the tubes are annealed in a controlled atmosphere. | |
| 5. NBK (+N) |
After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere. |
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| Package | 1. Bundle Packing. | |
| 2. Plain end or vanished as per customer's request. | ||
| 3. Wrapped in waterproof paper. | ||
| 4. Sackcloth with several steel strips. | ||
| 5. Pack in heavy tri-wall boxes. | ||
+C No heat treatment after the final cold drawig process
+LC After the final heat treatment there is a suitable drawing pass
+SR After the final cold drawing process there is a stress relieve heat treatment in a controlled atmosphere
+A After the final cold drawing process the tubes are annealed in a controlled atmosphere
+N After the final cold drawing operation the tubes are normalized in a controlled atmosphere
Testing:
100% PMI,Spectro Chemical Aanlysis Test for Raw Material
100% Dimension & Visual Examination
100% Hydrostatic Test or 100% NON-DESTRUCTIVE Test (ET or UT)
Mechanical Properties Test Include Tension Test,Flaring Test (For Seamless tube/pipe)/ Flange Test (For Welded Pipe & Tube), Hardness Test ,Reversed Flattening Test
Straightness Test