Standard No.:	GB/T 14234-1993
English Name:	roughness for plastic parts
Chinese Name:	塑料件表面粗糙度
Chinese Classification:	G31    Basic standards and general methods for synthetic resin and plastic
Professional Classification:	GB    National Standard
Source Content Issued by:	AQSIQ; SAC
Issued on:	1993-3-4
Implemented on:	1993-1-2
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	2000 words
Translation Price(USD):	60.0
Delivery:	via email in 1 business day

1 Subject content and applicable scope This standard specifies the surface roughness parameters, parameter values and general rules for the requirements for plastic parts. It is mainly applicable to the surface roughness for plastic parts of electronics, aerospace products, instrumentation and apparatus as well as other products, and is a reference for the surface roughness for plastic parts of other products. 2 Normative references GB 131 Mechanical drawings - Surface roughness symbols and methods of indicating GB 1031 Surface roughness parameters and their values GB 3505 Surface roughness - Terminology - Surface and its parameters 3 Terms and symbols Terms used in this standard, such as arithmetical mean deviation of the profile Ra, ten point height of irregularities Rz, maximum height of the profile Ry, sampling length l, evaluation length ln, mean spacing of the profile irregularities Sm, mean spacing of local peaks of the profile S, profile bearing length ratio tp, profile section level c, etc., are in accordance with those specified in GB 3505.

1 Subject content and applicable scope 2 Normative references 3 Terms and symbols 4 Surface roughness parameters 5 Surface roughness parameter values 6 Sampling length and evaluation length 7 General rules for surface roughness requirements Annex A Additional parameters for evaluating surface roughness and their values (Supplement) Annex B Surface roughness for plastic parts achieved by different processing methods and different materials (Supplement) Additional explanation