api 5ld 英文版_语言版本

API 5LD是针对长距离输送管线系统的一个标准，API是美国石油协会的简称，而5LD指的是第五版的线路管道规范，这个标准为油气行业的管线系统设计、建造、运营和维护提供了指导和要求。

由于API 5LD是一个专业性很强的文档，并且通常是以英文发布的，因此没有提供“api 5ld 英文版_语言版本”的具体信息，不过，我可以为你概述API 5LD的内容结构：

API 5LD Pipeline System Line Pipe Standard

1. General Provisions

Scope

Field Documentation and Records

Responsibility of the Owner

Training

Quality Assurance

2. Design Considerations

Design Basis

Loads

Stress Analysis

Strain Based Limits

Deflection Control

Supports and Expansion Joints

3. Materials

Steel Pipe

Welding Consumables

Coatings and Linings

4. Fabrication, Inspection, and Testing

Fabrication

Examination

Testing

Nondestructive Examination Personnel Qualification

5. Pipeline Installation

Trenches

Bends

Lowering Pipe into the Trench

Backfill and Burial

River Crossings

Laying on or in Mudline

Hydrostatic Testing

6. Commissioning and Decommissioning

Commissioning

Decommissioning

7. Operation and Maintenance

Operating Conditions

Maintenance

Patching

Inservice Inspection

Cathodic Protection

8. Appendices

A. Glossary of Terms Used in This Standard

B. Recommended Practices for FitnessforService of API 5L Pipe

C. Paragraphs Revised or Added Since Previous Publication

D. Metric/English Units Conversion Tables

9. Indexes

Identification Index

Subject Index

请注意，上述内容是根据API 5LD的结构大致概括的，并不完整，如果你需要更详细的信息或具体的章节内容，请直接查阅最新版的API 5LD标准文档，通常这些文档需要购买才能获得，你可以从美国石油协会（API）或其授权代表处获取。