Jiangsu Hongbao Group Co., Ltd.
Jiangsu Hongbao Group Co., Ltd. Manufacture since 1958
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ASTM GB DIN Standard Seamless Steel Tube Black Oiled Round Carbon Steel Tube
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Types
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Application
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Structure Purposes
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General structure and mechanical
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Liquid Services
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Petroleum, gas and other fluids conveying
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Low and Medium Pressure Boiler Tube
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Steam and boiler manufacturing
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Hydraulic Pillar Service
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Hydraulic support
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Auto Semi-shaft Casing
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Auto sem-shaft casing
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Line Pipe
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Oil and gas conveying
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Tubing and Casing
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Oil and gas conveying
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Drill Pipes
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Well drilling
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Geological Drilling Pipe
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Geological drilling
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Furnace tubes, heat exchangers tubes
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Furnace tubes, heat exchangers
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Specification:
| 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. | ||
Delivery condition of seamless cold drawn mechanical tubing
BK (+C) Cold finished/hard (cold finished as drawn).
BKW (+LC) Cold finished/soft
BKS (+SR) Cold finished/stress relieve annealed.
GBK (+A) Annealed.
NBK (+N) Normalized.
Application
Fuel injection lines/nozzles for diesel or gasoline engine;
Compressed natured gas CNG tube
Drive transmission: steering column elements