Changzhou Joyruns Steel Tube CO.,LTD
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It is mainly used on refrigeration condenser and evaporator, brake tube, oil
injection tube line and link pipe parts. It would be in coils and straight tube
THE TYPE OF SURFACE COATING, CONDITION AND CODE STEEL TUBE
| type | Coating condition | code |
| CU coated both sides a | Cu coated on the outer and inner side both | DWCuCu |
| ZN coated outer CU, coated inner b | Outer Zn coated, inner CU coated | DWZnCu |
| an electric or hot dip galvanized. b made by both sides CU coated steel coil. On the welding line ,to be negotiated | ||
Main size OD and thickness
| OD /mm | Thciknes/mm | |||||||
| 0.50 | 0.60 | 0.65 | 0.70 | 0.80 | 0.90 | 1.00 | 1.20 | |
| 3.18 | √ | — | — | — | — | — | — | — |
| 4.00 | √ | √ | √ | √ | — | — | — | — |
| 4.76 | √ | √ | √ | √ | √ | — | — | — |
| 5.00 | √ | √ | √ | √ | √ | — | — | — |
| 6.00 | √ | √ | √ | √ | √ | √ | √ | √ |
| 6.35 | √ | √ | √ | √ | √ | √ | √ | √ |
| 7.94 | — | √ | √ | √ | √ | √ | √ | √ |
| 8.00 | — | √ | √ | √ | √ | √ | √ | √ |
| 9.53 | — | √ | √ | √ | √ | √ | √ | √ |
| 10.00 | — | √ | √ | √ | √ | √ | √ | √ |
| 12.00 | — | √ | √ | √ | √ | √ | √ | √ |
| 12.70 | — | √ | √ | √ | √ | √ | √ | √ |
The tolerance allowed of the ODof the steel tube
| OD | The tolerance allowed (based on no coating) |
| ＜ 4.76 | ±0.05mm |
| 4.76 ～ 8.00 | ±0.08mm |
| ＞ 8.00 ～ 12.00 | ±0.10mm |
| ＞ 12.00 ～ 18.00 | ±0.12mm |
The tolerance allowed of the thickness of the steel tube
| thickness | The tolerance allowed (based on no coating) |
| 0.50 | ±0.07mm |
| 0.70 | ±0.08mm |
| 1.00 | ±0.09mm |
| 1.30 | ±0.10mm |
WORKING SHOP
Laboratory Testing Equipment
PACKING