PD CEN/TS 15223:2017 Plastics piping systems. Validated design parameters of buried thermoplastics piping systems

Physical properties of soils
Rigid pipes
Structural design
Factor of safety
Flow charts
Mathematical calculations
Formulae (mathematics)
Pressure pipes
Sewerage
Semi-rigid structures
Sewers
Imposed loading
Pipelines
Pipes
Safety measures
Flexible pipes
Loading
Underground
Drainage
Strength of materials
Pipe laying
Water supply

Link: PD CEN/TS 15223:2017 Plastics piping systems. Validated design parameters of buried thermoplastics piping systems
Source: BSI Standards

PD ISO/TR 23605:2018 Technical product specification (TPS). Application guidance. International model for national implementation

Technical drawing
Dimensions
Symbols
Technical writing
Engineering drawings
Geometric surfaces
Standardization
Mechanical components
Documents
Specifications
Technical documents
Product specification
Graphic representation
Dimensional tolerances
Graphic symbols
Design

Link: PD ISO/TR 23605:2018 Technical product specification (TPS). Application guidance. International model for national implementation
Source: BSI Standards