GB/T 25431.1-2025Extruders and extrusion lines of rubber and plastics - Part 1: Safety requirements for extruders (English PDF)

1 Scope

This document specifies the safety requirements for the design and manufacture of all types of rubber and plastic screw extruders.

This document applies to the entire lifecycle of the extruder (see section 5.4 of GB/T 15706-2012), during the intended use, with...

And all significant hazards, dangerous conditions and risks related to the extruder that may arise from misuse that the manufacturer could reasonably foresee.

Hazardous events (see Appendix A).

This document also covers the following feeding systems.

---hopper;

---Single roller feeding system;

---Double roller feeding system;

---Package feeding system.

And the following auxiliary equipment.

---Network switching device;

---Mel gear pump;

---Melt piping and melt connectors;

---Static mixer;

---Exhaust system;

---Extruder head.

This document does not include.

---The material processing process may pose a risk of explosion;

---Requirements for equipment and protective systems used in potentially explosive atmospheres;

---Design requirements for exhaust ventilation systems.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 3766 General rules and safety requirements for hydraulic transmission systems and their components

GB/T 3767-2016 Acoustic pressure method for determining the sound power level and sound energy level of a noise source in an approximately free field above a reflecting surface.

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GB/T 3768-2017 Acoustic sound pressure method for determining the sound power level and sound energy level of a noise source using the envelope measurement surface above the reflecting surface.

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GB/T 5226.1-2019 Electrical Safety of Machinery - Electrical Equipment of Machinery - Part 1.General Technical Conditions

GB/T 8196 General requirements for the design and manufacture of fixed and movable protective devices for mechanical safety.

GB/T 12265 Minimum Spacing for Preventing Crushing of Human Body Parts in Mechanical Safety

GB/T 45132 | GB/T 25156 | GB/T 32662 | GB/T 25431.3 | GB/T 25431.2 | GB 25431.3 | […]