T/BYXT 142-2025 Active Group standards

T/BYXT 142-2025 Specification for Quality Consistency Control of Rare Earth Modified Basalt Fiber

Publish Date: 2025-12-19 Implement Date: 2025-12-19 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/BYXT 142-2025

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Mineral materials and products

Publish Date: 2025-12-19

Implement Date: 2025-12-19

Scope

This document specifies the quality control system architecture, key quality control requirements, statistical process control methods, inspection rules and handling of non-conforming products, and packaging and traceability for the production of rare earth-modified basalt fibers. This document applies to the quality consistency control and management of rare earth-modified basalt fibers produced using the process specified in T/BYXT 141. 5. Key Quality Control Requirements 5.1 Control of Raw Material Fluctuations The allowable fluctuation range of key indicators for main raw materials and the measures to be taken when exceeding the limit values shall comply with Table 2. Table 2 Item Allowable Fluctuation Range Measures to Be Taken When Exceeding the Limit Values SiO2 Mass Fraction Nominal Value ±1.5% Initiate the compensation coefficient adjustment procedure of the rare earth dosing ratio formula Rare Earth Raw Material Particle Size Nominal Value ±50 nm Initiate the secondary ball milling procedure for a period of not less than 30 minutes Dispersant (PVP) Water Content ≤0.05% Perform vacuum drying treatment (conditions: 60 ℃, 4 h) 5.2 Process Stability Control 5.2.1 Melting Section The control limits and statistical process control (SPC) rules for key process parameters in the melting section shall comply with Table 3. Table 3 Parameter Control Limit SPC Rules Melt Viscosity 180–220 Pa·s Monitor using the mean–range control chart (Xbar–R chart), with a subgroup size of 5 Melt Electric Field Strength Fluctuation ±5% of the set value Monitor using a trend chart, and trigger an alarm when there are seven consecutive rising or falling trends 5.2.2 Spinning Section (1) An adaptive PID control algorithm shall be implemented to control the variation coefficient (CV value) of fiber diameter by adjusting the spinning back pressure in real time (with an adjustment accuracy of not less than ±0.02 MPa). (2) The sp