Refractory contractors install, dry out, inspect, repair and tear out the heat-resistant linings of furnaces, kilns, boilers and vessels, and a buyer compares them on scope, API standard and cost drivers. Refractories are nonmetallic materials for environments above 538 °C (1,000 °F) (ASTM C71-12(2024)), and the classes a contractor installs are defined under refractory materials.
Four API documents govern the work by lining type: Std 936 (5th edition, March 2024) for monolithic linings, Std 975 (2nd edition, April 2025) for brick, Std 976 (2nd edition, October 2024) for fiber and RP 982 (1st edition, released 2023-11-01) for inspection. Relining cycles run from 20 minutes to 2 months for steel vessel linings and up to 10 years in glass (RHI Magnesita, 2021 company estimate), and direct material plus installation may be only 40 to 60 % of total refractory-related cost (Tata Steel IJmuiden, 2017). An itemized quote with eight scope blocks shows which bid leaves work out.
Every value names its standard and edition, the product data sheet or the dated source it comes from; see our methodology and fact-checking process.
What Does a Refractory Contractor Do?#
A refractory contractor sells contracted work on industrial linings: installation by casting, gunning, shotcrete, bricklaying or fiber modules, curing and dry-out, inspection and testing, hot and cold repair, and tear-out of spent lining.
Contractors are one supply chain tier, next to raw material, additive and binder producers, refractory producers and distributors. A match request carries four dimensions: industry, service, method and region.
Refractory Services by Scope: From Design Review to Closeout#
A contracted lining job runs through eight scope blocks, from pre-job design review and layouts to a closeout report.
Table 1 compares the eight scope blocks with the standard or rule that governs each.
| Scope block | What the contractor does | Standard or rule |
|---|---|---|
| Pre-job and refractory lining design | design review, layouts, material traceability, crew and procedure qualification | API Std 936, 5th ed. (March 2024), monolithic linings |
| Tear-out and waste | wrecking, sorting, waste classification | EU List of Waste 16 11 01* to 16 11 06; 40 CFR 261.2(e) for reuse |
| Shell and refractory anchors | shell repair, anchor supply and welding | owner specification |
| Installation | casting, pumping, shotcrete, gunning, ramming, bricklaying, fiber modules | API Std 936, 975 (2nd ed., April 2025) or 976 (2nd ed., October 2024) by lining type |
| Curing | ambient hydration before heating | producer data sheet |
| Dry-out and heat-up | burners, thermocouples, controlled first heating | producer schedule; API Std 936 dry-out procedure |
| Inspection and testing | as-installed samples, CCS and MOR tests, thermography | ASTM C133-24; EN ISO 10059-1:2025; API RP 982 (1st ed., 2023-11-01) |
| Closeout | final walkthrough, report with photos | contract |
Installation Methods and How They Change a Quote#
Contractors place linings by casting, pumping, shotcrete, dry gunning, ramming, bricklaying and fiber module installation, and the method sets crew, equipment and material tonnage. Each placement method is described step by step under refractory installation methods.
The method changes installed density, so the take-off differs. For insulating castable INSULMIX 2350 the typical value is 0.80 g/cm³ (50 lb/ft³) cast and 1.04 g/cm³ (65 lb/ft³) gunned, and for PUMPLITE 60 it is 0.91 g/cm³ (57 lb/ft³) pumped and 1.14 g/cm³ (71 lb/ft³) shotcreted (typical values of these products, Allied Mineral Products guide, 2023). Shotcrete gives less rebound and dust than dry gunning (Allen, Shotcrete, Spring 2008).
Dry-Out and Heat-Up Specialists#
Dry-out is a separate contract on some jobs: the manufacturer sets the schedule, the installer or designer writes the plan, the owner accepts it and a dry-out contractor executes it (Jenkins et al., 2011). A dry-out contractor brings its own burners when the main burner cannot turn down far enough. Schedule temperatures refer to the hot gas in contact with the lining, steam occupies about 1,600 times the volume of its water, and trapped moisture under rapid heating causes cracking and spalling (dry-out specialist statement).
Schedules, holds by castable type and the cost of burners, fuel and days are set out under refractory dry-out and heat-up schedules.
Repair, Relining and Tear-Out Work#
Repair work splits into cold repair, where the crew cuts back to sound material, replaces anchors, recasts or guns and dries locally, and hot repair by hot gunning, slag splashing or ceramic welding while the unit stays hot.
A reline starts with tear-out. In most cases more than 50 % of installed refractory ends as waste at wrecking (Tata Steel IJmuiden, 2017). EU waste falls under six mirror entries 16 11 01* to 16 11 06 (Decision 2000/532/EC as amended by 2014/955/EU). In the US, legitimate reuse of spent brick with only incidental processing is not solid waste under 40 CFR 261.2(e) (EPA letter of 2026-06-25), and states may be stricter.
Refinery repair assessment follows API RP 982, and hot and cold methods are compared under refractory repair and maintenance.
Standards for Contractor Work: API 936, 975, 976 and RP 982#
Contracted lining work in refineries and petrochemical plants follows four API documents by lining type: API Std 936 (5th edition, March 2024) for monolithic linings, API Std 975 (2nd edition, April 2025) for brick systems, API Std 976 (2nd edition, October 2024) for AES and RCF fiber linings, and API RP 982 (1st edition, released 2023-11-01) for inspection and assessment. API 936 sets installation quality control procedures, may supplement owner specifications, qualifies materials, equipment and personnel, covers preshipment and as-installed testing and dry-out, and defines the inspector's role.
Table 2 lists the four documents and the individual certification, with no equivalence implied.
| Document (edition) | Lining type | What it governs |
|---|---|---|
| API 936 refractory installation quality control: API Std 936, 5th edition, March 2024 | monolithic linings and materials | material, equipment and personnel qualification; preshipment testing; as-installed testing; dry-out; compliance datasheet |
| API Std 975, 2nd edition, April 2025 | refractory brick systems and materials | installation quality control, inspection and testing |
| API Std 976, 2nd edition, October 2024 | AES and RCF fiber linings and materials | installation quality control, inspection and testing |
| API RP 982, 1st edition, released 2023-11-01 | linings in refinery equipment (FCC and fluid solids units, reformers, fired heaters, incinerators, SRUs, ducts, stacks, boilers) | installation, in-service inspection, repair assessment |
| API 936 individual certification | inspectors | valid three years; 85 questions (75 scored), 3.25 h, closed book |
Inspector and Crew Qualification Under API 936#
API 936 qualifies the installation procedure and the crew before work starts and names who inspects: the owner, the contractor, the inspector and the manufacturer each carry defined responsibilities. The API individual certification for 936 is valid three years, and the exam runs 85 questions (75 scored) in 3.25 h, closed book, with the current exam window April 2025 to December 2026.
A quote names who provides the inspector and the test panels. In service, linings are checked by shell thermography, embedded thermocouples and visual and hammer sounding during outages, and sampling plans are covered under refractory inspection and quality control.
As-Installed Testing: ASTM and EN ISO Methods#
Samples cast or gunned during installation are tested for cold crushing strength and modulus of rupture to ASTM C133-24 or EN ISO 10059-1:2025 and EN ISO 5014:2025, which replaced EN 993-5 and EN 993-6 on 2025-12-09. Gunned specimens are prepared to ASTM C903-15(2020), and abrasion is tested to ASTM C704/C704M-15(2022)e1; the ASTM and EN ISO methods are not equivalent.
Which Industries Hire Refractory Contractors, and How Often?#
Every industry with high-temperature linings hires refractory contractors, and the relining cycle sets the interval: from 20 minutes to 2 months for steel vessel linings, annually in cement and lime, every 1 to 10 years in non-ferrous plants, up to 10 years in glass and every 5 to 10 years in energy and chemicals (RHI Magnesita, 2021 company estimate). Steel slide gates may need replacing every four hours. Outside steel, refractories are 0.2 to 1.5 % of a facility's life-cycle cost with replacement cycles of 1 to 20 years (RHI Magnesita FY2024 results, 2025-02-27).
- refractories for iron and steel: vessel linings, cycle 20 minutes to 2 months.
- cement and lime kiln refractories: kiln linings, relined annually; this row answers kiln refractory services.
- glass furnace refractories: furnace campaigns of up to 10 years.
- refractories for aluminium: melting and holding furnaces, in the non-ferrous cycle of 1 to 10 years.
- copper smelter refractory: smelter relines, in the non-ferrous cycle of 1 to 10 years.
- refinery and petrochemical refractories: API-governed units, in the energy and chemicals cycle of 5 to 10 years.
- boiler refractory: boiler repair and relining, in the energy and chemicals cycle of 5 to 10 years.
- induction furnace lining: coreless induction furnaces, relined on their own cycle.
How to Compare Refractory Contractor Quotes#
Compare refractory contractor quotes block by block, not on the total: two bids for the same reline can differ in tear-out, anchors, curing, dry-out or inspection, and only an itemized scope shows which one leaves work out. Buyers increasingly judge total cost of ownership, campaign life and uptime rather than price alone (RHI Magnesita H1 2026).
Table 3 is a checklist of quote lines, what to check on each and why it moves the price.
| Quote line | What to check | Why it moves the price |
|---|---|---|
| Pre-job | layouts, traceability, procedure and crew qualification | design review hours |
| Tear-out | tonnage, method, waste class (16 11 mirror entry), disposal or reuse route | waste handling and haulage |
| Shell and anchors | alloy, count per m² (ft²), welding method, access | material and welding hours |
| Installation | method, tonnage at the placement-method density; refractory castable calculator for take-off | crew, equipment and tonnage |
| Curing | environment, cold-weather enclosure | heating and enclosure |
| Dry-out | burners, fuel, thermocouples, days, schedule owner | equipment hire and fuel |
| Inspection and testing | inspector, test panels, ASTM or EN ISO method | testing hours and panels |
| Hazard controls | containment, monitoring, respiratory protection for RCF, silica, Cr(VI) | enclosure and monitoring |
| Commercial | mobilization, shifts, outage window, payment terms | schedule and cash flow |
Scope Blocks a Quote Should Itemize#
An itemized quote lists pre-job work, tear-out and waste, shell and anchors, installation by method, curing, dry-out and heat-up, inspection and testing, and closeout, each with its own price line. For refinery work, ask which API document and edition the contractor works to and who supplies the compliance datasheet and preshipment test results.
Cost Drivers and Why There Is No Public Price List#
No public price list for refractory installation or dry-out was found on 2026-10-27, so contractors price each job from its quote factors. The factors are lining area and thickness, access and scaffolding, anchors, tonnage, placement method, crews and shifts, outage window, curing environment, dry-out equipment and fuel, tear-out tonnage and waste class, test panels, mobilization and payment terms.
Direct material plus installation may be only 40 to 60 % of the total refractory-related cost (Tata Steel IJmuiden, 2017). The US BLS producer price index for clay refractories (WPU1352, 1982 = 100) stood at 405.818 in September 2026, a trend, not a price.
Hazard Lines in a Quote: Fiber, Silica and Chromium#
Quotes carry lines for containment, air monitoring, respiratory protection and hazardous waste when the lining holds refractory ceramic fiber, crystalline silica or chromium-bearing brick. The OSHA respirable crystalline silica PEL is 50 µg/m³ as an 8 h TWA with an action level of 25 µg/m³ (29 CFR 1910.1053 and 1926.1153, effective 2016-06-23). The EU binding limits are 0.3 f/ml for RCF and 0.1 mg/m³ for respirable crystalline silica (Directive (EU) 2017/2398, transposition by 2020-01-17). For Cr(VI), the OSHA PEL is 5 µg/m³ with an action level of 2.5 µg/m³ (29 CFR 1910.1026, eCFR text of 2026-10-27), and the EU limit is 0.005 mg/m³ since 2025-01-18 (Directive (EU) 2017/2398).
- ceramic fiber health rules
- crystalline silica in refractories
- hexavalent chromium in spent magnesia chrome refractories
- spent refractory recycling and disposal
Contractor Lists, Trade Associations and Producer Networks#
Lists of refractory contractors come from three sources: trade associations, producer contractor finders and construction directories, and none of them ranks or tests the firms it lists. The Refractories Institute (US) has a Contractor/Installer member category, while PRE (EU) and IRMA (India) are the producer associations. A US refractory producer's contractor finder lists 144 contractor and installer offices in the US and Canada (company statement, 2026).
Some producers also sell installation, relining and dry-out services, or full-line contracts priced per tonne of steel, where the buyer can lose cost knowledge (Tata Steel IJmuiden, 2017). How producers and distributors quote is covered under refractory manufacturers and suppliers.
Request a Contractor for Installation, Dry-Out or Repair#
A contractor request names the unit and industry, the service, the lining type and method, the area or tonnage, the outage window and the country, so independent contractors can scope it.
How Do Contractor Services Connect to Refractory Materials?#
Every contracted service acts on a refractory class, from bricks and castables to fiber linings, so the material pages explain what the contractor installs and why it fails.
- refractory bricks: shaped classes laid by masonry crews.
- monolithic refractories: castables and gunning mixes placed by casting, pumping and gunning.
- refractory insulation: fiber linings and backup layers.
- refractory raw materials: the grains inside every class.
- refractory additives and binders: cements and fibers that set dry-out needs.
- properties of refractory materials: data sheet values and test methods.
- refractories by industry: linings by plant type.
- refractory practice: design, installation, dry-out, inspection and repair.
What Is Refractory Masonry?#
Refractory masonry is the bricklaying of refractory brick linings with refractory mortar, the trade a refractory masonry contractor sells. The ISO 5019-1:1984 square measures 230 x 114 x 64 mm or 230 x 114 x 76 mm (9.06 x 4.49 x 2.52 or 2.99 in), and North America calls it a straight. Brick systems in refineries follow API Std 975 (2nd edition, April 2025).
Do Refractory Contractors Also Supply the Material?#
Some do: contractors install material they buy from producers and distributors, while some producers sell installation, relining and dry-out themselves. A separate material request lets the buyer compare material and labor apart, because installed material accounts for only part of the job cost.