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FBE anti-corrosion pipe process monitoring requirements Zhongyuan Pipeline Manufacturing Co., Ltd
keyword Zhongyuan Pipeline Manufacturing Co., Ltd Category Anti-coating pipe quality Related products Get a quote| Monitoring requirements for FBE anti-corrosion pipe process | ||||
| No. | Process name | Inspection items | Inspection frequency | Control content |
| 1 | Steel pipe acceptance | Product standards, materials, geometric dimensions | Each batch | Comply with standards or contract requirements, and have a product quality certificate. |
| And quality certificates, etc | ||||
| Visual inspection | Each one | Should meet the standard requirements. Unqualified products cannot be coated with anti-corrosion layer | ||
| weld reinforcement | Each one | Not exceeding 2.5mm, and the weld seam should have a smooth transition. | ||
| 2 | Acceptance of anti-corrosion coating materials | Epoxy powder coating | each batch | Product quality certificate and inspection report, user manual, factory certificate of conformity, production date and validity period. The supplier of epoxy powder coating should provide a performance inspection report that has been tested by a nationally certified inspection agency according to the corresponding performance items specified in the standards. The performance should meet the requirements specified in the standards. The packaging is intact and stored according to the manufacturer's instructions. |
| 3 | Coatings and Coatings | Quality confirmation of epoxy powder coating | Each production batch shall not exceed | The indicators of epoxy powder coating should meet the standard requirements |
| Quality confirmation | 50t once | |||
| Quality confirmation of epoxy powder coating | Once per batch | The coating performance of the coated specimen should meet the standard requirements | ||
| 4 | Surface treatment of steel pipes | clean up | Each one | The surface is free of attachments such as grease and dirt. |
| Surface temperature of steel pipe | Each one | The surface temperature of the steel pipe shall not be lower than 3 ℃ above the leakage point temperature | ||
| Surface rust removal grade | Each one | The surface rust removal grade should reach Sa2.5 level. After surface treatment, the steel pipe surface should be protected from moisture, rust, or secondary pollution. After surface treatment, the steel pipe should be coated within 4 hours. If rust or surface contamination occurs after 4 hours, the surface treatment should be repeated. | ||
| Surface anchor depth | At least 3 times per class, | Surface anchor depth 50-100 μ m | ||
| Two steel pipes each time. | ||||
| Surface dust level | At least 3 times per class, | Meet the Level 2 requirements specified in GB/T18570.3. | ||
| Two steel pipes each time. | ||||
| salinity | At least once per class, | Not exceeding 20mg/m ². | ||
| Two steel pipes each time. | ||||
| 5 | Coating process control | Process testing | each batch | The coating thickness and temperature should meet the standard requirements. Determine the coating process parameters. |
| Steel pipe heating | 100% | The heating temperature of the steel pipe before coating shall be within the recommended range of the supplier, but shall not exceed 275 ℃, and shall be checked and recorded at least once every hour | ||
| Process parameter monitoring | 100% | Produce anti-corrosion coating according to the process parameters determined by applicability testing. Check and record at least once every hour | ||
| cooling | 100% | After the polyethylene layer is coated, it should be cooled with water to a temperature of no more than 60 ℃ in the steel pipe, and the fusion bonded epoxy coating should be fully cured. | ||
| 6 | End face treatment | Reserved length at the pipe end | Each one | It should meet the standard requirements, and the reserved section should not have any coating |
| 7 | Process inspection | Coating leakage inspection | 100% | The leak detection voltage is 5V/ym, with no leakage points |
| Coating appearance inspection | 100% | The surface should be smooth, without dark bubbles, pockmarks, wrinkles, and uniform color. The anti-corrosion pipe end should have no curled edges. | ||
| Coating thickness inspection | Measure at least 1 out of every 10 after the 1st, 5th, and 10th roots | The anti-corrosion layer thickness of 4 evenly distributed points in the circumferential direction on 3 sections of each steel pipe, and the anti-corrosion layer thickness at the weld seam should be tested, and the results should meet the requirements of the standard regulations | ||
| Curing time of coating | At least once per class | Should meet the requirements of standard regulations | ||
| Type test | At least once per class | Take a 500mm pipe section and measure the coating index according to the standard | ||
ADD：Chengnan Industrial Development Zone, Yanshan County, Hebei Province
Domestic phone number：0086-317-6689999
International call：0086-317-6165555
E-mail:9905791@qq.com
