This guide supports early procurement discussion. Final material selection, installation and heat-up decisions must be confirmed for the actual project.
Start with the current acceptance basis
GB/T 2608-2025 is the current Chinese national product standard for silica refractory bricks and replaced GB/T 2608-2012 in February 2026. The older coke-oven-specific YB/T 5013-1997 record is marked withdrawn, so it should not be copied into a new RFQ as if it were current.
State the governing standard, revision, plant specification and order-specific grade. If an existing oven drawing or maintenance document cites an older standard, ask the owner or engineering authority to confirm the current acceptance basis and any approved equivalent before requesting offers.
- Current standard and revision
- Owner, licensor or plant specification
- Confirmed grade and approved equivalent
- Contract document order of precedence
Map the exact coke oven zone and work scope
A coke oven battery is not one uniform refractory duty. Heating walls, chambers, regenerators, roofs, charging openings, doors and localized repair zones differ in geometry, heat transfer, cycling, load and exposure.
Identify whether the inquiry covers a new battery, planned cold repair, partial rebuild or operating-temperature repair. For replacement work, include the current brick grade, remaining lining, damage map and approved repair method rather than asking for a visually similar product.
- Battery and oven design reference
- Exact zone and lining function
- New build, cold repair or hot-repair boundary
- Current material, damage map and available work window
Define thermal and mineral requirements with named tests
Silica refractory behavior depends on mineral conversion, temperature history and the way the oven design accommodates expansion. Chemistry alone does not show whether a brick package will match the approved wall, joint and heat-up design.
Ask for the properties required by the governing specification, together with units, test methods, specimen conditions and acceptance limits. Keep guaranteed contract values separate from typical brochure data, and leave the final expansion allowance and heat-up procedure to the approved oven engineering package.
- Required chemistry and relevant impurity limits
- Mineral conversion or residual-phase requirements where specified
- Apparent porosity, density and hot-load evidence
- Thermal expansion or conductivity under named methods
- Guaranteed limits separated from reference values
Control every special shape through drawings
Coke ovens can use many interlocking and special-shaped refractory units. Small dimensional errors can accumulate across a heating wall or chamber and affect joint quality, assembly and gas tightness.
Issue controlled drawings, a shape-code register and quantities. Identify critical dimensions, tolerance methods, inspection templates, pre-assembly requirements, brick marks and the pallet sequence required by the construction team.
- Drawing number and revision
- Shape code, quantity and critical dimensions
- Tolerance, warpage and squareness criteria
- Template or pre-assembly hold points
- Marks, pallet map and erection sequence
Separate conventional brickwork from repair products
Conventional silica brickwork, high-thermal-conductivity products, zero-expansion repair bricks and modular fused-silica blocks are different technical routes. Public supplier portfolios confirm these alternatives exist, but they are not automatic substitutes for one another.
For repair inquiries, document the remaining lining, joint condition, access, operating temperature, damage depth and restart plan. The proposed product and construction method must be reviewed against the oven design and the approved safety procedure.
- Existing brick and adjacent lining
- Repair location, depth and access
- Temperature window and shutdown duration
- Joint design, mortar and compatibility
- Approved installation and restart method
Make inspection specific to the supplied lot
Define the lot, sampling, dimensional checks, laboratory tests, witness points and retest rules before production. Certificates and inspection reports should identify the contracted manufacturer, exact grade, batch, test method, result and applicable acceptance limit.
For complex shape packages, connect inspection records to brick marks, pallet numbers and the bill of materials. A report for a similar grade or a different production period is not batch evidence for the goods being shipped.
- Lot and batch definition
- Sampling and test frequency
- Visual and dimensional inspection
- Certificate and third-party witness scope
- Link between reports, marks and shipped goods
Protect the installation sequence through delivery
Packing is part of the technical scope when a battery package contains many shapes. Confirm pallet construction, moisture and impact protection, marks, packing lists, spare shapes and the loading sequence before shipment.
The commercial offer should match the approved bill of materials and identify included mortar, spares, inspection documents, Incoterm, destination, required date and any site-service boundary.
- Approved brick and mortar quantities
- Pallet marks and packing-list match
- Spare shapes and replacement policy
- Destination, Incoterm and required delivery date
- Site supervision and installation responsibility
Send a complete coke oven silica brick RFQ
A complete first inquiry reduces the risk that suppliers quote different grades, shapes or inspection scopes. Send the technical and commercial inputs together and require every deviation to be stated clearly.
If the current grade, drawing or standard is uncertain, share the available documents and mark the point for technical confirmation instead of filling the gap with an assumed value.
- Oven design, zone and work scope
- Current standard, grade and guaranteed properties
- Controlled drawings, shape schedule and quantities
- Mortar, joints, inspection and documentation
- Packing sequence, destination and project schedule
Public references used for this guide
These references support the classification and procurement framework. They do not replace the current product data sheet, project specification or contract acceptance criteria.
- China National Public Service Platform for Standards: GB/T 2608-2025Official record confirming that GB/T 2608-2025 is current, replaced the 2012 edition and took effect on February 1, 2026.
- China National Public Service Platform for Standards: YB/T 5013-1997Official record marking the former coke-oven silica-brick industry standard as withdrawn; it should not be presented as a current purchasing standard.
- Sinosteel Luonai: Refractory Materials for Coke OvensOfficial cooperation-network portfolio reference confirming coke-oven refractory and silica-product routes; order-specific grades and guarantees still require current technical confirmation.
- RHI Magnesita: COMPAC Coke BlockOfficial public reference illustrating a modular fused-silica coke-oven repair route and the importance of joints, installation, heat-up and dimensional stability.
- RHI Magnesita: Steel ReductionOfficial public overview identifying coke-oven shaped and unshaped materials, special parts, checkerwork, roof shapes, precast blocks and coke-side bricks.