Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
D1799-20 – Standard Test Method Technical Guide
📦 Scope and Significance
This standard practice covers the sampling of packaged carbon blacks for shipment in bags, cartons, flexible intermediate bulk containers (FIBC), or other non-bulk packages. It is used to obtain representative samples to determine the average quality or variability of the shipment. The tests to be performed on the samples are agreed upon by the producer and consumer as per relevant ASTM methods.
The values stated in SI units are considered standard, with parentheses for information only. This practice does not purport to address all safety concerns, and users should establish appropriate safety, health, and environmental practices in accordance with regulatory limitations.
🔧 Apparatus and Package Types
The required apparatus includes a riffle-type sample splitter, airtight sample containers of 4 dm³ (1-gal) capacity, a sample scoop, and a sample thief. Packaged shipments typically consist of bags in sizes such as 11.35 kg (25 lb), 22.7 kg (50 lb), 25 kg (55 lb), or 50 kg (110 lb). Flexible intermediate bulk containers usually range from 180 kg (396 lb) to 1300 kg (2860 lb). This practice may be applied to packages of other sizes as needed.
| 📏 Package Type | 📐 Typical Size Range |
|---|---|
| Bags | 11.35 kg (25 lb) to 50 kg (110 lb) |
| FIBCs | 180 kg (396 lb) to 1300 kg (2860 lb) |
💡 Ensure sample containers are airtight to prevent moisture loss or contamination, as specified in the standard.
📊 Sampling Quantity and Considerations
Samples are taken to evaluate conformance to specified requirements. The number of samples, their location within the lot, and the quantity are determined by the purpose of sampling. For a lot, it is generally desirable to take one sample for each 5000 kg (11,000 lb) increment. For smaller lots being sampled for uniformity, three samples representing approximately equal masses are recommended. If the uniformity of the lot is suspect or unknown, more samples may be required. For lots with known acceptable uniformity, one sample may be sufficient.
| 📊 Lot Size | ⚡ Recommended Samples |
|---|---|
| Up to 5000 kg (11,000 lb) | 1 sample (or 3 for uniformity check) |
| Above 5000 kg (11,000 lb) | 1 sample per 5000 kg increment |
| Uniformity unknown or suspect | More samples as needed |
⚠️ Improper sampling may yield non-representative results. Follow the sampling pattern agreed upon by the producer and consumer for accurate lot evaluation.
❓ Frequently Asked Questions
🔍 What is the primary purpose of this practice?
The practice is for obtaining representative samples of carbon black from packaged shipments to determine average quality or variability.
💡 How many samples should be taken for a typical lot?
Generally, one sample per 5000 kg increment is recommended. For smaller lots, three samples are recommended if uniformity is to be checked.
⚡ What apparatus is required for sampling?
A riffle-type sample splitter, airtight containers of 4 dm³ capacity, a sample scoop, and a sample thief are required.
📌 Can this practice be used for different package sizes?
Yes, it can be applied to bags and FIBCs of various sizes, as agreed upon by the producer and consumer.