GB/T 20801.4-2006 Pressure Piping Code - Industrial Piping - Part 4: Fabrication and Assembly (Text of Document is in English) - Beijing translation compay

Contents
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 Examination and Acceptance of Piping Components and Pipe-supporting Elements
5.1 Acceptance of material marking and quality evidentiary documents
5.2 Appearance examination
5.3 Material examination
5.4 Valve test
5.5 Nondestructive testing
5.6 Hardness examination
5.7 Doubled sampling examination, inspection or test
5.8 Material keeping
6 Piping fabrication
6.1 Cutting and groove preparation
6.2 Mark transplantation
6.3 Pipe bending
6.4 Plate welded pipe
6.5 Miter Elbows
6.6 Lap Joint
6.7 Jacket pipe
6.8 Supporter and hanger
7 Welding
7.1 Welding procedure qualification and welder technique qualification
7.2 Welding material
7.3 Welding environment
7.4 Pre-welding preparation
7.5 Basic requirements in welding
7.6 Welded joint arrangement
7.7 Fillet weld
7.8 Welded connection for branch pipe
7.9 Weld repairing
8 Preheating
8.1 General Requirements
8.2 Preheat Temperature
8.3 Measurement of Preheat Temperature
8.4 Interrupting Welding
9 Heat Treatment
9.1 Heat Treatment after Bending and Forming
9.2 Post-weld Heat Treatment
9.3 Heating and Cooling
9.4 Measurement of Heat Treatment Temperature
9.5 Hardness Examination
9.6 Replacing Heat Treatment
9.7 Changes of Basic Requirements for Heat Treatment
9.8 Segment Heat Treatment
9.9 Partial Heat Treatment
9.10 Re-heat Treatment
10 Assembly and Erection
10.1 General Requirements
10.2 Flange Connection
10.3 Threaded Connection
10.4 Other Types of Connection
10.5 Piping Pretension (or Compression)
10.6 Piping Connecting Equipments
10.7 Buried Piping
10.8 Jacket Pipe
10.9 Valve
10.10 Piping Compensation Devices
10.11 Support and Hanger
10.12 Electrostatic Grounding
11 Stainless Steel and Nonferrous Metal Piping
11.1 Basic Requirements for Protection
11.2 Stainless Steel Piping
11.3 Aluminium and Aluminum Alloy Piping
11.4 Copper and Copper Alloy Piping
11.5 Nickel and Nickel Alloy Piping
11.6 Titanium and Titanium Alloy Piping
12 Piping Cleaning, Sweeping and Washing
12.1 General Requirements
12.2 Water Washing
12.3 Air Sweeping
12.4 Steam Sweeping
12.5 Chemical Washing