Page images
PDF
EPUB

(B) CHEMICAL Tests Chemical Properties.

8. (a) The classes and chemical properties of quicklime shall be determined by standard methods of chemical analysis.

(b) Samples shall be taken as specified in sections 6 and 7.

(c) Quicklime shall conform to the following requirements as to chemical composition :

CHEMICAL COMPOSITION

[blocks in formation]

(II) INSPECTION, PENALIZATION AND REJECTION Inspection.

9. (a) All quicklime shall be subject to inspection.

(b) The quicklime may be inspected either at the place of manufacture or the point of delivery, as arranged at the time of purchase.

(c) The inspector representing the purchaser shall have free entry at all times, while work on the contract of the purchaser is being performed, to all parts of the manufacturer's works, which concern the manufacture of the quicklime ordered. The manufacturer shall afford the inspector all reasonable facilities for inspection and sampling, which shall be so conducted as not to interfere unnecessarily with the operation of the works.

(d) The purchaser may make the tests to govern the acceptance or rejection of the quicklime in his own laboratory or elsewhere. Such tests, however, shall be made at the expense of the purchaser. Penalization.

10. All prices shall be based upon minimum percentage of calcium oxide. If a lower grade is furnished than the one specified it may, at the option of the purchaser, be accepted upon making a rebate equal to the percentage of calcium oxide below the minimum designated. Rejection.

11. (a) Unless otherwise specified, any rejection based on failure to pass the tests prescribed in these specifications shall be reported within ten working days from the taking or receipt of samples.

(b) Rejected quicklime shall be returned to the shipper or as he may direct. All freight charges in both directions to be paid by the shipper. Rehearing.

12. Samples which represent rejected quicklime shall be preserved in air-tight container for ten working days from the date of test report. In case of dissatisfaction with the results of the tests, the manufacturer may make claim for a rehearing within that time.

W. C. S. 4.
STANDARD SPECIFICATIONS FOR SULPHATE OF

ALUMINA TO BE USED IN WATER TREATMENT
Definition.

1. This chemical shall be the commercial product known as Basic Sulphate of Alumina.

(1) CHEMICAL PROPORTION AND TESTS Sampling

2. The sample shall be a fair average of the shipment. Five per cent of the packages shall be sampled. The sample shall be taken from the surface to the center of the package. A five-pound sample shall be sent immediately to the laboratory and transferred to an air-tight container in which the unused portion shall be stored until the alumina has been finally accepted or rejected by the purchaser.

Check tests on samples taken from cars at their destination will occasionally be made, and should agree within reasonable limits with initial sample. Chemical Properties.

3. (a) The chemical proportion of basic sulphate of alumina shall be determined by standard methods of chemical analysis.

(b) Basic sulphate of alumina shall contain not less than 17 per cent. water soluble aluminum oxide (Al, Oz); 3 per cent by weight of the aluminum oxide shall be in excess of the theoretical amount required to combine with the sulphuric acid present.

(II) PhysicAL PROPERTIES AND TESTS 4. The material shall be in dry lump form and shall be free from lint, chips, ash or other foreign matter.

(III) PACKING AND MARKING 5. Basic sulphate of alumina shall be packed in cloth or duck bags of not more than 50 lb. net weight, or in barrels or containers of not more than 300 lb. net weight.

6. The name of manufacturer, net weight and percentage of water soluble alumina shall be plainly stencilled on each end of package or marked on tag securely attached thereto.

(IV) INSPECTION, PENALIZATION AND REJECTION 7. (a) All basic sulphate of alumina shall be subjected to inspection.

(b) It may be inspected at the place of manufacture or point of delivery, or both, as arranged at the time of purchase.

(c) The inspector representing the purchaser shall have free entry at all times, while work on the contract of the purchaser is being performed, to all parts of the manufacturer's works which concern the manufacture of the sulphate of alumina ordered. The manufacturer shall

afford the inspector all reasonable facilities for inspection and sampling, which shall be so conducted as not to interfere unnecessarily with the operation of the works.

(d) The purchaser may make the tests to govern the acceptance, penalization or rejection of the alumina in his own laboratory or elsewhere. Such tests, however, shall be made at the expense of the purchaser. Penalization.

8. All prices shall be based upon the percentage of water soluble aluminum oxide.

If a lower grade is furnished, it may be accepted at the option of the purchaser, provided the deficiency does not exceed one per cent. The contract price to be reduced in the ratio of the deficiency to the 17 per cent of water soluble aluminum oxide specified. Rejection.

9. (a) Unless otherwise specified, any rejection based on failure to pass tests presented in these specifications shall be reported within ten working days from the taking or receipt of sample by the purchaser.

(b) Rejected basic sulphate of alumina shall be returned to the shipper or as he may direct. All freight charges in both directions to be paid by the shipper. Rehearing

10. Samples which represent rejected basic sulphate of alumina shall be preserved in air-tight containers for ten working days from the date of test report. In case of dissatisfaction with the results of the tests, the manufacturer may make claim for a rehearing within that time.

W. S. C. 5. STANDARD SPECIFICATIONS FOR SULPHATE OF IRON

TO BE USED IN WATER TREATMENT

Definition.

1. Sulphate of iron is the ferrous sulphate, the theoretical formula of which is Fe SO, + 7H20. Classes.

2. Sulphate of iron commercially does not have exactly seven molecules of water combined with one molecule of anhydrous ferrous sulphate. 3. Commercially there are three grades:

(a) Prime green, selects, or stick crystals.
(b) Seconds or bottoms.
(c) Granular or sugar sulphate of iron.

(1) CHEMICAL PROPERTIES AND Tests Sampling.

4. The samples shall be a fair average of the shipment and shall be taken from the surface to center of each package.

Ten one-pound samples shall be taken from packages in various locations in each carload or less. These samples shall be thoroughly mixed, and then quartered. One-quarter shall then be placed in an air-tight container and submitted to the purchaser's laboratory for tests.

Check tests on samples taken from cars at their destination will occasionally be made, and should agree within reasonable limits with initial sample. Chemical Properties.

5. (a) The chemical properties of the material shall be determined by standard methods of analysis, and the shipments shall conform to the following minimum requirements:

(b) Impurities: Not over 2 per cent.
(c) Anhydrous ferrous sulphate Fe SO.: Not less than 53.5 per cent.
(d) Free Sulphuric Acid: Not over .025 per cent.

(II) PHYSICAL PROPERTIES AND TESTS Physical Properties.

6. Shipments of seconds or bottoms shall be rejected. Either Grade (a) or Grade (c) shall be furnished as specified on the purchase order. Unless otherwise specified, Grade (c) shall be furnished.

(III) PACKING AND MARKING Packing.

7. Sulphate of iron shall be packed in cloth or duck bags of not more than 100 lb. net weight, or in barrels or containers of not more than 250 lb. net weight as specified in purchase order. Marking.

8. The name of the manufacturer, net weight and grade of sulphate of iron shall be stencilled on each package, or marked on tag securely attached thereto.

Iree

(IV) INSPECTION AND REJECTION Inspection.

9. (a) All sulphate of iron shall be subjected to inspection.

(b) The sulphate of iron may be inspected at the place of manufacture or point of delivery, or both, as arranged at the time of purchase.

(c) The inspector representing the purchaser shall have entry at all times, while work on the contract of the purchaser is being performed, to all parts of the manufacturer's works which concern the manufacture of the sulphate of iron ordered. The manufacturer shall afford the inspector all reasonable facilities for inspection and sampling, which shall be so conducted as not to interfere unnecessarily with the operation of the works.

(d) The purchaser may make the tests to govern the acceptance or rejection of the sulphate of iron in his own laboratory or elsewhere. Such tests, however, shall be made at the expense of the purchaser. Rejection.

10. (a) Unless otherwise specified, any rejection based on failure to pass tests prescribed in these specifications shall be reported within 10 working days from the taking or receipt of samples by the purchaser.

(b) Rejected sulphate of iron shall be returned to the shipper or as he may direct. All freight charges in both directions to be paid by the shipper. Rehearing.

11. Samples which represent rejected sulphate of iron shall be preserved in air tight containers for 10 working days from the date of test report. In case of dissatisfaction with the results of the tests, the manufacturer may make claim for a rehearing within that time.

O

« PreviousContinue »