1. PURPOSE
1.1 This fabrication and erection specification defines the responsibility and the criteria for locating and installing the shipping pipe supports to protect the cold box piping during transit and removing them after the cold box is erected.
2. scope
2.1 This specification applies to all shop-fabricated cold boxes that are shipped without mineral wool or perlite packing in place during transit.
2.2 Boxes that are filled with insulation (for example, perlite or mineral wool) do not require the use of additional shipping supports.
3. related documents
3.1 Air Products Engineering Documents None.
4. PIPE SUPPORT LOCATIONS
4.1 Table 1 shows the maximum allowable pipe spans between supports to protect the piping system during transit. See paragraphs 4.2 to 4.7 for specific design criteria.
4.2 Maximum Span from Origin shows the maximum allowable span from equipment nozzles, branch connections, and cold box penetrations (piping origins). These connections are especially susceptible to road vibrations and must be given special attention. Maximum span on a branch connection is the length of the branch pipe between the branch connection and the first shipping support.
4.3 Maximum Span for Straight Runs shows the maximum allowable spans for straight runs of pipe that do not include a concentrated weight (for example, valve or flange).
4.4 Maximum Span for Runs with Elbow(s) shows the maximum allowable spans for piping runs that contain one or more elbow(s). The span shown is the developed length of the piping between shipping supports.
4.5 Maximum Span from Pipe Free Ends shows the maximum allowable spans from shipping supports to a free end of a piping run. Piping runs that contain a concentrated weight at the free end shall be supported within five pipe diameters from the concentrated weight.
4.6 Maximum Span from Concentrated Weights shows the maximum allowable spans for piping runs that contain a concentrated weight (for example, valves or flange). Reducers, transition joints, and couplings are not considered to be concentrated weights.
4.7 Flexible connectors (flex hoses and expansion joints) shall be supported within five piping diameters of either end of the flexible connector. If either end of the flexible connector is free ended (for example, disconnected from equipment), the free end shall be temporarily supported during shipping. Temporary supports shall not be physically attached to the mechanical assembly of the expansion joint or the braided metal hose. Temporary supports may be attached (not welded) to the end fitting on the free-end of the expansion joint or metal hose, when necessary.
Table 1 Maximum Allowable Pipe Span Between Shipping Supports
| Nominal Pipe Size mm (in) | Maximum Span from Origin (see par. 4.2) mm (ft) | Maximum Span for Straight Runs (see par. 4.3) mm (ft) | Maximum Span for Runs With Elbow(s) (see par. 4.4) mm (ft) | Maximum Span from Pipe Free Ends (see par. 4.5) mm (ft) | Max. Span from Concentrated Weights (see par. 4.6) mm (ft) | ||||||
| 15 (1/2) | 1525 | (5) | 4575 | (15) | 3050 (10) | 915 (3) | 915 (3) | ||||
| 20 (3/4) | 1525 | (5) | 6100 | (20) | 4575 (15) | 915 (3) | 915 (3) | ||||
| 25 (1) | 1525 | (5) | 6100 | (20) | 4575 (15) | 915 (3) | 915 (3) | ||||
| 40 (1 1/2) | 1830 | (6) | 6100 | (20) | 4575 (15) | 915 (3) | 915 (3) | ||||
| 50 (2) | 1830 | (6) | 9150 | (30) | 6100 (20) | 915 (3) | 915 (3) | ||||
| 65 (2 1/2) | 2135 | (7) | 9150 | (30) | 6100 (20) | 1220 (4) | 1220 (4) | ||||
| 80 (3) | 2135 | (7) | 9150 | (30) | 6100 (20) | 1220 (4) | 1220 (4) | ||||
| 100 (4) | 2745 | (9) | 12200 | (40) | 7625 (25) | 1525 (5) | 1525 (5) | ||||
| 150 (6) | 3355 | (11) | 15250 | (50) | 9150 (30) | 1525 (5) | 1525 (5) | ||||
| 200 (8) | 3660 | (12) | 18300 | (60) | 12200 (40) | 1830 (6) | 1830 (6) | ||||
| 250 (10) | 3965 | (13) | 21350 | (70) | 13725 (45) | 1830 (6) | 1830 (6) | ||||
| 300 (12) | 4575 | (15) | 27450 | (90) | 18300 (60) | 2135 (7) | 2135 (7) | ||||
| 350 (14) | 4575 | (15) | 27450 | (90) | 18300 (60) | 2135 (7) | 2135 (7) | ||||
| 400 (16) | 4880 | (16) | 30500 | (100) | 19825 (65) | 2440 (8) | 2440 (8) | ||||
| 450 (18) | 5185 | (17) | 30500 | (100) | 19825 (65) | 2440 (8) | 2440 (8) | ||||
| 500 (20) | 5490 | (18) | 30500 | (100) | 19825 (65) | 2745 (9) | 2745 (9) | ||||
| 600 (24) | 6100 | (20) | 30500 | (100) | 19825 (65) | 3050 (10) | 3050 (10) | ||||
| 750 (30) | 6710 | (22) | 30500 | (100) | 19825 (65) | 3050 (10) | 3050 (10) | ||||
5. DOCUMENTATION
5.1 All shipping supports shall be assigned sequential numbers, and their locations shall be documented on the attached form: Shipping Pipe Supports List.
6. RESPONSIBILITY
6.1 The shipping supports’ locations shall be determined by an Air Products representative using the guidelines provided in Table 1 unless the fabrication shop is notified in writing to locate them.
6.2 The fabricator shall be responsible for the design, fabrication details, materials, and the installation of the shipping supports. The design of the supports shall be suitable for maintaining the piping system’s structural integrity during transit. The design of the supports shall and must facilitate ease of their removal at the final destination. The fabricator shall paint these supports bright yellow.
6.3 The first four columns in the Shipping Pipe Supports List shall be completed by the person locating the shipping supports. Column 5 shall be completed by the inspector responsible for the inspection of the shipping support after the installation. The fabricator shall send the Shipping Pipe Supports List, with columns 1 through 5 completed to the Air Products project engineer. The project engineer shall send the list to the Air Products field superintendent. The last column shall then be completed by the inspector witnessing the removal of the shipping supports.
6.4 The completed Shipping Pipe Supports List shall be kept in the Construction Quality Control (QC) files and a copy sent to the Air Products project engineer.
| Shipping Pipe Supports List | |
| Air Products Project and Item No. Cold Box No. | Air Products P.O. No. Fabricator’s Name
Fabricator’s Job No. Page of |
| Column 1 | Column 2 | Column 3 | Column 4 | Column 5 | Column 6 |
| Shipping Pipe Support No. | Line No. Supported | Mounted to Box Front, Rear, Left, or Right | Elevation | Installed per 4ACB-683001 Inspector’s Signature/Date | Removed Inspector’s Signature/Date |