| AMERICAN Engineering SPECIFICATION | |
| Packed Density Determination of Mineral Wool | 4ACB-685003*Revision 0 26 July 2012 Page 1 of 3 |
RESPONSIBLE GROUP: Cold Box Engineering *Formerly 685.003 Denotes Revision Reapproved, No Technical Changes
1. PURPOSE
1.1 This fabrication and erection specification defines a method for measuring the packed density of mineral wool insulation.
2. SCOPE
2.1 This specification applies to mineral wool in metal ducts and cold boxes used for service temperature range of -254 to +316C (-425 to +600F).
2.2 This specification is intended for use by the mineral wool supplier prior to shipment of the material.
2.3 Mineral wool is furnished to Air Products Specification 4WCB-50002. The need and extent of compaction testing is specified in Vendor Document Requirements attached to 4WCB-50002, and in paragraphs 5.1 and 5.2 of this specification (685.003).
3. RELATED DOCUMENTS
3.1 Air Products Engineering Documents 4WCB-50002 Mineral Wool for Cold Box Insulation Vendor Document Requirements
4. Definitions
4.1 Certificate of compliance is a document in which the manufacturer certifies that the products supplied are in compliance with the requirements of the order, without mention of any test results.
4.2 Shipping density is a density not exceeding 192 kg/m3 (12 lb/ft3).
4.3 Packed density is a density of 240 kg/m3 (15 lb/ft3).
4.4 Random sample is a sample taken without bias, so that every item has an equal chance of inclusion. For the purpose of this document, a random sample shall consist of one shipping package or a portion extracted from the production line. Random samples from the production line shall be taken at quantities not greater than one shipping package and at intervals not less than one operating hour. Care shall be taken to ensure that the sample includes a proportional amount of shot and any other particles that separate while extracting the sample.
4.5 Representative sample is a sample resulting from planned action taken to ensure that specified proportions of its contents are drawn from different subportions. For the purpose of this document, a representative sample shall mean a quantity of mineral wool composed of a minimum of five random samples. The total quantity shall be thoroughly mixed.
4.6 Specimen is a portion of representative sample which is not less than 59 kg (130 lb). A specimen shall include a proportional amount of shot and any other particles that separate during mixing. The density of the specimen shall be equal to the shipping density.
5. APPLICATION
5.1 A supplier who has previously furnished mineral wool to this specification and who can also furnish a certificate of compliance with the requirements of this specification shall be considered as having met the necessary requirements provided that the mineral wool previously supplied has met this specification in full.
5.2 A supplier who has not previously furnished mineral wool to this specification shall proceed with the packed density determination as outlined in Sections 6 and 7.
6. APPARATUS
6.1 One “Rockwool Box” that will be used to contain the packed mineral wool. The box inside dimension shall be 610 X 610 X 610 mm3 (2 X 2 X 2 ft3).
6.2 One “Weight Box” with the configuration and outside dimensions shown in Figure 1. The weight box shall be used to pack the mineral wool inside the rockwool box.
Figure 1
Outside Dimensions and Configurations of the Weight Box
6.2.1 The lifting bars on the weight box shown in Figure 1 shall be located at a comfortable lifting elevation for the people conducting the test (about chest level).
6.3 95 kg (209 lb) of sand that will be used to load the weight box. The volume of the sand will approximately be equal to 0.065 m3 (2.3 ft3).
6.3.1 The weight box may be loaded by other means (i.e., concrete blocks) as long as the total weight of the weight box is as specified in paragraph 7.2 of this specification.
6.4 Specimen.
7. PROCEDURE
7.1 The empty rockwool box shall be weighed and the weight of the rockwool box shall be recorded.
7.2 The weight box shall be loaded with a portion of the sand so the total weight of the weight box and the included sand is equal to 94.8 kg (209 lb).
7.3 The rockwool box shall be loaded with a layer of the specimen not higher than 152 mm (6 in).
7.4 The weight box shall be lifted by four men, using the lifting bars provided, and carefully placed on top of the specimen layer located in the rockwool box.
7.5 The weight box shall be allowed to rest on the layer for not less than 5 seconds while being supported by the lifting bars in the lateral direction only.
7.6 The weight box shall not be allowed to rest on the same location of the layer for more than
15 seconds.
7.7 The weight box shall be lifted by the lifting bars and carefully placed to a new location on the layer.
7.8 When moving the weight box to a new location on the layer, care must be taken so the weight box is not dropped on the layer.
7.9 The procedures specified in paragraphs 7.7 and 7.8 shall be repeated until the weight box has been moved on the entire cross sectional area of the layer.
7.10 The procedure specified in paragraphs 7.3 through 7.9 shall be repeated until the rockwool box is entirely “filled and packed” with the specimen.
7.10.1 The rockwool box is considered to be “filled and packed” when the specimen is packed and leveled exactly to the top of the box by use of the procedures specified in Section 7.
7.11 The rockwool box, “filled and packed” with the specimen, shall be weighed.
7.12 The requirements of this specification shall be considered satisfied when the weight of the filled box determined in paragraph 7.11, less the weight of the box determined in paragraph 7.1, is in a range between 51 and 58 kg (112 and 128 lb).