Unit 1

Passage 1 Pipeline Basics

Passage 2 The Alaska Pipeline

Unit 2

Passage 1 Types of Natural Gas Pipelines

Passage 2 The GIS Introduction

Unit 3

Passage 1 In-line Inspections （Smart Pig）

Passage 2 Inspection of the Corrosion State of Underground Pipelines

Unit 4

Passage 1 Pipeline Repairs

Passage 2 How to Recognize a Natural Gas Leak

Unit 5

Passage 1 Reasons of Pipeline Corrosion

Passage 2 Pipe Coatings

Unit 6

Passage 1 Valves

Passage 2 Gas Hydrate Primer

Unit 7

Passage 1 Pipeline Construction （Ⅰ）

Passage 2 The Pipe Jacking （Ⅰ）

Unit 8

Passage 1 Pipeline Construction （Ⅱ）

Passage 2 The Pipe Jacking （Ⅱ）

Glossary