DL/T 1147-2018 in English
VALIDFall arrester for high-level power working
- Issued on:2018-04-03
- Implemented on:2018-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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| Standard No: | DL/T 1147-2018 |
| Document status: | VALID |
| Title in English: | Fall arrester for high-level power working |
| Title in Chinese: | 电力高处作业防坠器 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2018-04-03 |
| Implemented on: | 2018-07-01 |
| Superseding: |
DL/T 1147-2009 Mobile fall arrester on power altitude working
|
| Professional Classification: | DL-Electricity |
| Related Topics: | dl/t1147-2009
Fall arrestor Technical requirements for fall arresters dl/t1147 dl/t+1147 Protection for working at heights fall prevention Working at heights Anti-fall device classification Fall arrester industry Anti-fall guide rail Anti-fall guide rail standard Fall arrester standard |
Introduction
Background of Standard Revision and Technological Evolution
| Technical Dimension | DL/T 1147-2009 | DL/T 1147-2018 | Significance of Revision |
|---|---|---|---|
| Definition of Terms | 12 items | 14 items (newly added falling distance and braking force) | Improve the impact dynamics parameter system |
| Speed Differential Fall Arrester | Static Load Test Requirements | Delete the static load test, and add requirements such as wire rope diameter ≥5mm | Strengthen dynamic protection performance |
| Test method | Impact/fall tests are separated | Merge into fall test, add Figure 8-9 static load diagram | Simplify test process |
Analysis of key technical requirements
1. Classification and performance of fall arresters
The standard defines three types of fall arresters: speed differential fall arrester, rigid guide rail fall arrester and flexible guide rail fall arrester. The comparison of their core indicators of fall performance is as follows:
| Type | Rated Braking Load(120kg) | Rated Working Load(100kg) | ||
|---|---|---|---|---|
| Falling Distance | Impact Force | Falling Distance | Impact Force | |
| Speed Differential Type | ≤2.2m | ≤9kN | ≤2.0m | ≤6kN |
| Rigid Guide Rail | ≤1.4m | ≤9kN | ≤1.2m | ≤6kN |
| Flexible guide rail (wire rope) | ≤1.4m | ≤9kN | ≤1.2m | ≤6kN |
2. Material and process upgrade
- Metal parts: Bolt performance level is upgraded to 6.8, and the hardness requirement of key axle pin is HRC35-45
- Synthetic fiber belt: New requirements for the end seam of the stitching ≥13mm and the cross/Chuan stitching line
- Anti-corrosion treatment: Clarify the hot-dip galvanizing process standards (except stainless steel parts)
Implementation suggestions
1. Purchase precautions
According to clause 4.3.2 of the standard, when purchasing a speed differential fall arrester, you should focus on checking:
- Whether the diameter of the wire rope is ≥5mm (measured with a vernier caliper)
- Whether there is an anti-wear protection device at the outlet
- Whether the top hanging point is equipped with a rotatable device
2. Preventive test management
According to clause 6.2.4 of the standard, an annual inspection system should be established:
| Inspection items | Test load | Qualification standard |
|---|---|---|
| Rigid guide rail fall arrester | 2.205kN | No structural deformation |
| Connecting rope | 2.205kN/5min | No broken strands |
FAQ
Q: How to determine the service life of a fall arrester?
A: According to standard 4.5.1.6, the effective period is 4 years after leaving the factory, and the longest period is 3 years after being put into use, and it must be scrapped after the fall test.
Q: What are the suggestions for buffer selection?
A: According to standard 4.5.7, type I buffer (braking force ≤4kN) is suitable for lighter personnel, and type II (braking force ≤6kN) is suitable for heavier working conditions.
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