This guide maps each standard referenced by GB/T 3007-2017 (Refractory products—Determination of moisture content) to the step it covers in a laboratory workflow. It also summarizes the 2006→2017 edition change at a high level and how labs handle shaped versus unshaped refractories. For principle, equipment and procedure summary, start with the GB/T 3007-2017 overview page.
Referenced Standards Correspondence Map
GB/T 3007 does not redefine sampling for every product form. Laboratories must pull the correct companion standard before drying begins:
| Referenced standard | Covers in the GB/T 3007 workflow | Typical lab use |
|---|---|---|
| GB/T 17617 | Sampling of refractory raw materials | Lot size, increment count and composite sample for powders, grains and other raw feeds before moisture determination |
| GB/T 10325 | Sampling / acceptance of shaped refractory products | Brick / shaped-piece sampling plan and acceptance context when moisture is measured on shaped ware |
| GB/T 4513.2 | Sampling of unshaped refractory materials | How to take increments from castables, plastics, ramming mixes and similar unshaped products |
| GB/T 4513.3 | Preparation path for unshaped refractories | Test-portion preparation and handling before / during the GB/T 3007 drying sequence for unshaped materials |
| GB/T 8170 | Rounding of numerical values | Round the reported moisture to one decimal place so certificates stay consistent across labs |
Fiber products: cut pieces from each sampling unit as required by GB/T 3007, then apply the same drying / constant-mass logic. Always record which sampling standard was used on the test report (fields a–f style checklist).
2006 → 2017 Edition Notes
GB/T 3007-2017 replaces GB/T 3007-2006. Laboratories should update work instructions, report templates and referenced-edition lists to the 2017 text. Practical continuity points that buyers and QC teams care about: free-moisture definition remains mass loss after 105–110 °C drying; oven control stays at 110 ± 5 °C; balance resolution remains tied to 1/10000 of sample mass; duplicate 10–50 g portions, ≥2 h first dry and ≥30 min repeat cycles to constant mass (Δm ≤ 0.1% of prior mass) remain the procedural backbone; result still rounds to one decimal place. Confirm any clause renumbering, normative-reference list updates, and report-field wording against the official 2017 PDF when writing SOPs — do not rely on a web summary for accreditation evidence.
Shaped vs Unshaped Laboratory Practice
Shaped refractories: sample per GB/T 10325, prepare the test portion, dry dish to constant mass, run duplicate 10–50 g portions through the GB/T 3007 drying cycle, calculate free moisture, round per GB/T 8170, and fill report fields a–f.
Unshaped refractories: sample per GB/T 4513.2, then follow GB/T 4513.3 for preparation before applying the same GB/T 3007 drying / constant-mass / calculation steps. Mixing water, binders or packaging moisture can dominate the result, so chain-of-custody timing between sampling and weighing matters.
Raw materials: sample per GB/T 17617. Exclusion: if the material contains organics that volatilize at test temperature, GB/T 3007 alone is not appropriate; document the exclusion and agree an alternative method with the customer.
How This Guide Relates to Steel Supply Pages
GB/T 3007 is a refractory test method, not a plate grade. Gangsteel publishes this interpretation because the filename historically sat in a download/news channel next to steel documents. Use steel-grade pages for chemistry and mechanicals; use this pair of pages only for moisture-test method literacy when refractory QC appears on a project package.
Frequently Asked Questions
What is the GB/T 3007 Referenced Standards & Correspondence Guide?
It is the companion page to the GB/T 3007-2017 overview. It maps GB/T 17617, 10325, 4513.2, 4513.3 and 8170 to sampling, preparation, drying result rounding and reporting roles.
Which referenced standard do I open first for shaped refractory moisture?
Start with GB/T 10325 for sampling / acceptance of shaped products, then execute drying and calculation under GB/T 3007-2017 and round with GB/T 8170.
Which path do unshaped refractories take under the GB/T 3007 correspondence guide?
Sample with GB/T 4513.2, prepare per GB/T 4513.3, then dry and calculate free moisture with GB/T 3007-2017. Record both 4513 parts on the report.
What changed from GB/T 3007-2006 to GB/T 3007-2017?
The 2017 edition replaces 2006. Core free-moisture logic at 105–110 °C remains; labs must update SOPs and normative references to the 2017 text and verify clause/report wording in the official standard.
How do labs use GB/T 8170 with GB/T 3007 results?
After calculating mass-loss percentage, round the reported moisture to one decimal place using GB/T 8170 so certificates from different operators stay comparable.
Where is the method overview for GB/T 3007-2017?
See GB/T 3007-2017 Refractory Moisture Content Test Method Overview for principle, equipment, procedure summary and applicability limits.
Document Control Reminder
Cite GB/T 3007-2017 and the exact editions of each referenced standard on every work instruction and test report. Web summaries are orientation aids only; accreditation evidence requires the official texts.