SY/T 6727-2020 in English
VALIDPetroleum drilling and production equipment-Hydraulic disk brake
- Issued on:2020-10-23
- Implemented on:2021-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
Introduction
Interpretation of the core content of the standard
SY/T 6727-2020, as a mandatory industry standard for hydraulic brake systems of oil drilling equipment, puts forward comprehensive technical requirements for the design, manufacture and inspection of hydraulic disc brakes. This standard is applicable to ZJ10-ZJ120 series drilling rigs, and its technical indicators directly affect the safety of drilling rig operations.
Comparison of main technical parameters
| Key indicators | SY/T 6727-2020 | SY/T 6727-2014 | Description of changes |
|---|---|---|---|
| Applicable drilling rig level | Newly added ZJ80/5850 | Not included | Expanded coverage of large-tonnage drilling rigs |
| Static balance level | G6.3 | G16 | Improved balancing accuracy requirements |
| Low-temperature hydraulic oil pour point | -60℃ | -35℃ | Enhanced extreme cold adaptability |
| Pressure gauge accuracy | ≥2.5 level | Undefined | New mandatory regulations |
Key technical requirements
Braking system functions
The standard requires that hydraulic disc brakes must integrate four major braking functions:
- Working brake: Normally open caliper hydraulic drive, minimum torque is calculated in Appendix A
- Parking brake: Normally closed caliper disc spring drive, torque ≥ 75% of working brake
- Emergency brake: Full clamp linkage mode
- Overhead crane anti-collision braking: safety interlock response time ≤0.5s
Key component requirements
Brake disc manufacturing must meet the following requirements:
- Parallelism ≤0.15mm, roughness Ra ≤1.6μm
- Total runout tolerance ≤0.3mm (relative to drum axis)
- Water cooling plate must pass 0.7MPa pressure test
- Welding and splicing process is prohibited
Inspection specification upgrade
The 2020 version of the standard strengthens the following inspection requirements:
- Type test: Added mandatory inspection frequency of 100 sets/times
- Hydraulic test: 1.5 times rated pressure for 10 minutes without leakage
- Brake verification: The torque must be measured on a drilling rig of the corresponding level
- Cleanliness: The hydraulic system requires ISO 4406 17/15 level
Implementation suggestions
Based on the standard requirements, the following measures are recommended:
- In extremely cold areas, use aviation hydraulic oil with a pour point of ≤-60°C (in compliance with GJB 1177A)
- Add VCI vapor phase anti-corrosion treatment to offshore platform equipment
- Establish a digital monitoring system for brake disc wear
- Perform MT inspection of clamp frame welds every 2000 hours
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