DWK 45240-100 KIMBLE 8" Oil Centrifuge Tube, Standard, 100 mL

Operations takeaway: The critical purchasing and operating controls are the exact 45240-100 standard SKU, 100 mL TC calibration, 37 × 203 mm dimensions, and 800 × g RCF limit. The method, centrifuge, rotor and carrier, and complete sample preparation procedure must also be qualified.

• Manufacturer: DWK Life Sciences
• Brand: KIMBLE® KIMAX®
• Catalog Number: 45240-100
• Product Family: 8-Inch Oil Centrifuge Tubes
• Version: Standard
• Material: Borosilicate glass 3.3
• Nominal Capacity: 100 mL
• Tube Length: 203 mm
• Tube Outside Diameter: 37 mm
• Calibration: To contain (TC)
• Graduation Markings: White ceramic enamel
• Lowest Scale Interval: 0.05 mL, from 0 to 0.5 mL
• Upper Scale Interval: 25 mL, from 25 to 100 mL
• Volume Tolerances: Seven manufacturer-specified volume bands
• Maximum Relative Centrifugal Force: 800 × g
• Maximum RPM: Depends on centrifuge rotor radius; not separately specified
• Snap Cap Size: 6
• Manufacturer-Identified Snap Cap: 28150R-6
• Shelf Pack Quantity: 6 tubes
• Manufacturer Case Quantity: 12 tubes
• Purchase Unit: Case
• Manufacturer ASTM Reference: D4007
• Additional Method References: ASTM D1796, D91, D128, D1093 and API MPMS Chapter 10.4
• Alternative Marking SKU: 45240LF-100, Lazer-Fused™
• Supplied Sterility: Not established
• Individual Calibration Certificate: Not established as included by the reviewed listing

Receiving rule: The manufacturer case is 12 tubes, with a shelf pack quantity of 6. The shelf pack designation does not independently establish a separately available six-tube selling unit at SOSCleanroom.

Measurement checkpoint: A 0.05 mL marked interval does not imply ±0.05 mL accuracy, a universal detection limit, or certified precision at every point. Interpret the readings with DWK's tolerance bands and the analytical method's requirements.

Specification note: The tolerance ranges and graduation intervals have different breakpoints. Do not combine them into a single simplified scale or apply the ±0.02 mL value across the entire 100 mL volume.

• TC: Volume held in the tube at the indicated graduation.
• TD: Volume delivered from a device calibrated for discharge.
• 45240-100 Designation: TC.
• Scale Reading: Follow the applicable petroleum method for the correct sample or interface level.
• Temperature: Use the method's specified conditions and any calibration-temperature requirements.
• Transfer Operations: Do not use this tube as a certified delivery instrument without independent qualification.

Calibration boundary: A TC marking and manufacturer tolerance table do not prove that an individually supplied tube includes a serialized calibration certificate or traceability document. Request documentation when required by a quality system.

Regulated testing checkpoint: Before purchasing for an ASTM or API procedure, confirm the current method's required tube design, calibration, centrifuge equipment, sample handling, reagent system, temperature, and acceptance criteria. A method reference is not a product certification.

• Sample Preparation: Follow the approved method for mixing and any reagent additions.
• Tube Filling: Use the specified liquid quantities and handling approach.
• Centrifugation: Apply the required conditions without exceeding the tube's RCF limit.
• Layer Formation: Allow the expected material separation under method-defined conditions.
• Graduated Reading: Read the specified layer boundaries using the correct scale.
• Reporting: Calculate and document the result as the governing method requires.
• Quality Control: Apply method-specific repeatability, acceptance, and corrective-action requirements.

General centrifuge relationship:

RCF (× g) = 1.118 × 10^-6 × radius (mm) × RPM²

• RCF: Relative centrifugal force expressed as multiples of gravity.
• Radius: Effective rotation radius, in millimeters, for the point being evaluated.
• RPM: Rotational speed of the centrifuge.
• Tube Limit: Maximum 800 × g for 45240-100.
• Rotor Limit: Also subject to the centrifuge and carrier manufacturer's specifications.
• Weakest Component: Operate within the lowest applicable safe limit of the tube and complete assembly.

Critical safety limit: 800 × g does not mean 800 RPM. Determine the correct speed using the actual centrifuge's radius and instructions. Never exceed the lower of the tube's maximum RCF or the safe operating limits of the rotor, carrier, closure, or other relevant components.

• Tube OD: 37 mm.
• Tube Length: 203 mm.
• Rotor or Bucket: Must be approved for the actual glass tube configuration.
• Tube Support: Use an appropriate carrier, insert, or cushion as specified by the centrifuge manufacturer.
• Rotor Clearance: Confirm safe operation without contact, interference, or unapproved tube positioning.
• Balancing: Follow the centrifuge manufacturer's sample-loading and balancing procedures.
• RCF: Do not exceed 800 × g.
• Glass Condition: Only use intact tubes free from scratches, chips, and cracks.

Equipment qualification: No universal centrifuge make, model, or rotor part number is approved by the reviewed 45240-100 listing. Verify the exact tube and equipment combination before use.

• Tube SKU: 45240-100.
• Snap Cap Size: 6.
• Identified Cap: 28150R-6.
• Closure Included: Not established by the reviewed tube-only listing.
• Cap Material: Confirm with manufacturer documentation for the actual cap SKU.
• Petroleum Compatibility: Evaluate the cap separately against sample liquids and test solvents.
• Centrifugation: Verify the approved closure setup under the centrifuge and analytical method requirements.

Accessory distinction: A cap designed to fit the tube is not necessarily a pressure-rated, vapor-tight, or universally centrifuge-approved closure. Treat cap retention, chemical compatibility, and operating safety as separate qualification requirements.

Selection checkpoint: Do not attribute Lazer-Fused™ scale durability or proprietary marking performance to the standard 45240-100. Choose the exact version required by the laboratory's purchasing specification.

• Confirmed Material: Borosilicate glass 3.3.
• Typical Strengths: Low thermal expansion and broad laboratory chemical durability.
• Hydrofluoric Acid: Incompatible with silica-based glass.
• Hot Concentrated Phosphoric Acid: Can attack glass.
• Strong Alkaline Solutions: Can cause chemical attack, particularly at elevated temperatures.
• Petroleum Samples: Evaluate the full reagent and processing environment.
• Mechanical Stress: Glass strength is affected by scratches, impacts, and thermal damage.
• RCF Limitation: The rated 800 × g remains applicable even when the glass is chemically suitable.

Qualification boundary: General borosilicate 3.3 material properties are not a finished-product pressure rating, validated thermal cycle, or permission to exceed the manufacturer's centrifugation limit.

• Flammable Materials: Follow the selected method's equipment and ignition-control precautions.
• Sample Vapors: Use the ventilation and containment measures required for the petroleum material.
• Glass Breakage: Do not centrifuge visibly damaged or scratched tubes.
• Rotor Balance: Follow the required loading configuration.
• Cap Retention: Do not assume a snap cap is suitable for all centrifugation or vapor exposure conditions.
• RCF: Do not exceed 800 × g.
• Centrifuge Equipment: Confirm the rotor and accessories are suitable for the actual sample and operating method.
• Glass Disposal: Use appropriate laboratory broken-glass disposal procedures.
• Spill Response: Follow the facility's petroleum sample and solvent cleanup procedures.

Safety priority: An intact tube, properly matched centrifuge carrier, controlled sample chemistry, and verified RCF are all necessary. Manufacturer tolerance data do not override safe centrifugation and hazardous-material handling procedures.

• Initial Inspection: Examine the body, tube mouth, lower graduated region, and white enamel scale.
• Residue Removal: Use an approved glass-compatible solvent or cleaning agent.
• Avoid Abrasives: Do not use hard implements or wire brushes that could score glass.
• Rinsing: Follow the method's specified sequence to remove cleaning residues.
• Drying: Use a procedure appropriate for the glass and any required analytical cleanliness.
• Scale Readability: Inspect the enamel marks for damage or loss of legibility.
• Post-Cleaning Inspection: Reject glassware with cracks, chips, scratching, or other defects.
• Requalification: Apply the laboratory's measurement and equipment-control procedures where necessary.

Cleaning caution: Petroleum residues and cleaning solvents can present chemical hazards even after testing. Avoid damaging the scale or the glass while cleaning, and discard tubes that no longer meet the laboratory's inspection requirements.

1. Verify Part Number: Match 45240-100 to the purchase order.
2. Confirm Product Version: Verify standard scale, not Lazer-Fused™ variant 45240LF-100.
3. Confirm Capacity: Check the 100 mL designation.
4. Verify Dimensions: 37 mm OD and 203 mm overall length.
5. Check Material: Borosilicate glass 3.3.
6. Inspect Graduations: Check the white enamel scale for legibility and visible damage.
7. Verify Calibration Labeling: Confirm the calibrated-to-contain configuration.
8. Check Case Quantity: Confirm 12 tubes.
9. Review Shelf Pack: Verify the manufacturer's designated quantity of 6 where applicable.
10. Inspect Glass: Reject chipped, cracked, etched, or scratched tubes.
11. Confirm Equipment Fit: Verify centrifuge, rotor, and carrier compatibility.
12. Confirm Cap Requirement: Source size 6 snap cap 28150R-6 separately if needed.
13. Record Disposition: Accept, quarantine, or reject in accordance with the laboratory's quality procedure.

Receiving checkpoint: The manufacturer's current listing establishes the 12-tube case and 6-tube shelf pack. It does not establish individually certified volumetric glassware, included snap caps, or an SOSCleanroom single-tube selling unit.

What is KIMBLE 45240-100 used for?

It is a specialized graduated 100 mL glass centrifuge tube for manufacturer-described petroleum testing methods, including water-and-sediment analysis in crude oil and related oil products.

Does 8-inch refer to the actual tube length?

Yes. DWK identifies the tube as an 8-inch oil centrifuge tube and publishes a length of 203 mm.

What is the outside diameter?

37 mm, as specified by the manufacturer.

Is the tube borosilicate glass?

Yes. DWK specifies borosilicate glass 3.3.

What is the maximum relative centrifugal force?

The manufacturer specifies a maximum of 800 × g.

Is 800 RCF equivalent to 800 RPM?

No. RCF depends on centrifuge speed and rotor radius. The allowable RPM must be determined from the actual equipment geometry and operating instructions.

What is the smallest graduation interval?

0.05 mL, from 0 to 0.5 mL. Larger intervals are used at higher volumes.

What is the tolerance at 0.1 mL?

DWK specifies ±0.02 mL for the 0 to 0.1 mL range. Different tolerances apply above that range.

What does calibrated to contain mean?

The scale represents volume held in the tube under the applicable calibration conditions. It is not a calibrated-to-deliver device.

Is the scale printed in white?

The manufacturer describes the scale and legend as durable white ceramic enamel.

Does 45240-100 use Lazer-Fused™ markings?

No. The Lazer-Fused™ version is the separately cataloged 45240LF-100.

Does this tube work with ASTM D4007?

DWK references ASTM D4007 for the product family. The laboratory must verify that the actual tube, centrifuge, procedure, and required method edition meet all applicable requirements.

Does it work for other petroleum methods?

DWK also references ASTM D1796, D91, D128, D1093, and API MPMS Chapter 10.4 in the product description. Review each method's current requirements before use.

What snap cap fits?

DWK identifies size 6 snap cap 28150R-6. Its inclusion with the tube case is not established, so it should be sourced separately if required.

Is the tube compatible with every centrifuge?

No. The laboratory must verify carrier fit, tube geometry, balancing, and centrifuge ratings for the actual equipment.

Are the tubes individually certified?

The reviewed manufacturer listing provides volumetric tolerances but does not establish an individual serialized calibration certificate as included.

How many tubes are in a shelf pack?

The manufacturer lists a shelf pack quantity of 6.

How many tubes come in a case?

The manufacturer case contains 12 oil centrifuge tubes.

Does the product arrive sterile?

The reviewed manufacturer information does not establish a supplied-sterile designation.

Can a scratched glass tube still be centrifuged?

No. DWK warns that scratches, chips, and abrasions significantly weaken glass centrifuge tubes. Remove damaged tubes from service.

• DWK Glass Types & Properties: Review Glass Material and Centrifuge RCF Guidance — chemical resistance, 3.3-expansion borosilicate properties, and centrifuge-force calculations.
• DWK Care & Maintenance of Laboratory Glassware: Review Glassware Safety and Inspection Guidance — cleaning, glass inspection, handling, and broken-glass precautions.
• DWK General Glassware Cleaning Advice: Review Laboratory Glassware Cleaning Advice — general cleaning practices and precautions concerning glass damage.
• Product-Specific Documentation: Contact SOSCleanroom for assistance requesting applicable volumetric documentation, material specifications, or technical clarification from DWK Life Sciences.