Far Infrared Sauna Grading Rules & Checklist This grading system uses A (Premium) / B (Standard) / C (Budget) tiers based on safety, performance, materials, and compliance. It aligns with common industry standards (e.g., ETL, CE, ISO) and third-party testing benchmarks. I. Grading Criteria (A/B/C) 1. Safety (EMF, Electrical, VOC) Grade A (Ultra-Low EMF): EMF: <1 mG at seated position …

PVC FOAM BOARD Quality Checklist & Grading Rules （Based on QB/T 5883-2023, QB/T 5884-2023, ISO & ASTM standards） 1. Basic Information Product Name: Rigid PVC Foam Board (Expanded PVC Sheet) Raw Material: Suspension-grade PVC resin + CaCO₃ + foaming agent + stabilizers + lubricants + impact modifiers Common Sizes: Thickness: 1mm–30mm Width: 1220mm / 1560mm / 2050mm Length: 2440mm / …

Laminated Flooring Quality Checklist and Grading Rules 1. Scope This document specifies quality check items, acceptance criteria, and grading rules for laminated flooring (laminate wood flooring), complying with EN 13329 and GB/T 18102-2020. It covers raw material inspection, in-process quality control, finished product testing, and A/B/C grading standards. 2. Quality Checklist 2.1 Raw Material & Structural Inspection 表格 Check ItemStandard …