Chlorine Tank Car Unloading Facilities Regulations (C.R.C., c. 1147)
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Regulations are current to 2023-03-06 and last amended on 2015-06-18. Previous Versions
Chlorine Tank Car Unloading Facilities Regulations
C.R.C., c. 1147
Regulations Respecting the Design, Location, Construction, Operation and Maintenance of Chlorine Tank Car Unloading Facilities
1 These Regulations may be cited as the Chlorine Tank Car Unloading Facilities Regulations.
2 In these Regulations,
chlorine means the chemical element Cl2 in liquid or gaseous form and containing not more than 150 parts per million of water; (chlore)
Commission means the Canadian Transport Commission; (commission)
- dangerous commodity
dangerous commodity means any substance subject to the Regulations for the Transportation of Dangerous Commodities by Rail or subject to any other regulation or order issued by the Commission to control its hazard; (marchandise dangereuse)
- main track
main track is a track extending through yards and between railway stations where trains are operated by timetable, train order, block signals, or some other approved method of control; (voie ferrée principale)
- owning or operating company
owning or operating company means the person or company owning or operating the chlorine unloading facility; (compagnie propriétaire ou exploitante)
- railway right-of-way
railway right-of-way means any lands that are owned or leased by a railway subject to the jurisdiction of the Commission and are contiguous to that railway’s tracks; (emprise du chemin de fer)
- railway station
railway station means any location where passenger and/or freight trains may stop in accordance with the current railway timetable; (gare de chemin de fer)
- railway station-dwelling
railway station-dwelling means a railway station building, part of which is used as a dwelling; (gare-habitation)
- serving track
serving track means the track serving the chlorine facility and upon which the chlorine tank cars are located for unloading purposes; (voie de desserte)
shall is used to indicate mandatory provisions; (le futur)
should is used to indicate recommendatory [provisions]; (le conditionnel)
- tank car
tank car means any vessel described as a tank car in the Regulations for the Transportation of Dangerous Commodities by Rail and is approved by the Commission for chlorine service, but does not include multi-unit tank cars such as the ICC 106A500-X tank car. (wagon-citerne)
3 These Regulations apply to chlorine tank car unloading facilities located on the right-of-way owned or leased by any railway company subject to the jurisdiction of the Canadian Transport Commission.
4 A chlorine tank car unloading facility approved by an order of the Commission prior to July 31, 1965 shall be operated and maintained in accordance with these Regulations, but unless otherwise ordered by the Commission, it need not conform to those provisions of these Regulations pertaining to location, construction and design.
5 These Regulations do not apply to chlorine stationary bulk storage facilities; the erection of such facilities on the railway right-of-way is prohibited.
PART IApplications to the Board
6 (1) Except as provided in subsection (2), no chlorine unloading facility or part thereof shall be constructed until the Commission has approved the proposed location by an order.
(2) If the proposed facility complies in all respects with Parts II, III, IV and V, approval of the location need not be obtained before construction is undertaken, but shall be obtained before the facility is used.
7 (1) Application for approval to locate a chlorine unloading facility on the railway right-of-way shall be submitted through the railway company concerned to the Secretary of the Commission.
(2) Applications shall be accompanied by four copies of all drawings, prepared in compliance with the requirements of sections 8 to 13.
8 (1) A plan of the chlorine facilities and of other structures on the same site shall be drawn to a minimum scale of one inch to 50 feet.
(2) A plot plan showing the location of the chlorine facilities in relation to off-site structures shall be drawn to a minimum scale of one inch to 200 feet.
(3) A section as described in section 11 shall be drawn to a minimum scale of one inch to 20 feet.
9 All drawings shall be dated, bear an identification number and the name of the applicant, and be signed by the Chief Engineer or other official of the applicant or consulting company responsible for them.
10 Except as provided in paragraph 13(g), the plan shall show the location of the chlorine unloading rack and of the tank car, when it is in position for unloading, in relation to the following buildings, structures and boundary lines:
(a) within 2,000 feet, any building mentioned in paragraph 16(a);
(b) within 1,000 feet, any building mentioned in paragraph 16(b);
(c) within 500 feet, any building mentioned in paragraph 16(c);
(d) within 75 feet, any building or structure mentioned in section 15;
(e) all buildings and other structures occupying the same site as the chlorine unloading facility;
(f) railway right-of-way boundaries;
(g) boundary lines of the property on which the chlorine unloading facilities are located;
(h) the nearest fire hydrant;
(i) the gauge side of the nearest rail of the track serving the facility;
(j) within 50 feet, the gauge side of the nearest rail of any main track or the curb line of any main road or street; and
(k) within 20 feet, the gauge side of the nearest rail of any track other than a main track or the track serving the facility.
11 A section shall be provided to show the elevation of the unloading facilities in relation to other structures on the same site and any track within 50 feet.
12 In addition to the structures previously referred to in this Part, the plan shall show the location of dikes, pipelines, power lines, sewers, ditches, watercourses and other similar major structures located on the same site or immediately adjacent thereto.
13 The notes or legend on the drawing shall include the following information:
(a) evidence that the Provincial Fire Marshal, Fire Commissioner, or local fire authority, having jurisdiction in the area adjacent to the railway right-of-way, has no objection to the proposed facilities; this evidence may take the form of a plan signature by the authority concerned, or of a letter addressed to the owning or operating company by such authority;
(b) a statement to the effect that the proposed facilities will comply in all respects with these Regulations, unless there are exceptions, in which case, the exceptions shall be listed;
(c) the size, type of construction and purpose of all buildings, tanks or structures located on the same site as the chlorine unloading facilities;
(d) location of the unloading site by reference to the name of the railway company serving the site, name of the railway subdivision, the railway mileage of the location and the name of the nearest town or city;
(e) the direction from which the prevailing winds blow;
(f) locations of the nearest available self-contained breathing apparatus and tank car emergency repair kit; and
(g) if there are no buildings within the restricted distance referred to in either paragraph 10(a), (b), (c) or (d), a statement to this effect shall appear in the drawing notes or legend.
13.1 Where the Commission has approved, pursuant to subsection 6(1), the proposed location of the chlorine unloading facility, a copy of each drawing referred to in subsection 7(2) shall be kept by the railway company for the life of the facility and retained for at least two years thereafter.
- SOR/85-468, s. 1
14 The location of a chlorine unloading site with respect to occupied buildings shall take into account the direction of the prevailing winds and where practicable it shall be located down wind from such buildings.
15 Except as provided in section 17, the horizontal distance between the centre point of a chlorine unloading rack or of a tank car, when it is at the unloading position, and the nearest point of any railway freight station, warehouse, storage tank or any other storage or transfer facility used for a combustible or a dangerous commodity shall not be less than 75 feet.
16 Except as provided in section 17, the horizontal distance between the centre point of a chlorine unloading rack or of a tank car, when it is at the unloading position, and the nearest point of any occupied building shall be in accordance with the following:
(a) not less than 2,000 feet from any school, hospital, hotel, motel, church, theatre, auditorium, sports arena, multi-store shopping centre, apartment or other multi-unit residential building, office building or department store or merchandise building of more than one storey in height, or any other building or enclosure considered by the Commission to belong to this category;
(b) not less than 1,000 feet from any single family dwelling, railway passenger station, railway station-dwelling, one storey office building, department store, merchandise building or restaurant, or other easily evacuated or low occupancy building or enclosure considered by the Commission to belong to this category; and
(c) not less than 500 feet from any factory, railway shop or other building used primarily for manufacturing or processing or for maintenance or repair work.
17 Notwithstanding sections 15 and 16, the Commission, at its discretion, may authorize lesser distances between a chlorine unloading rack or tank car and any building, storage tank or other structure located on the same site as the chlorine facilities and used exclusively by the company or person owning or operating the chlorine facilities.
18 The horizontal distance between the centre point of a chlorine unloading rack or of the tank car, when it is at the unloading position, and the nearest point of the line of any adjoining property which has been or may be built upon shall not be less than 50 feet.
19 The horizontal distance between the track side of a chlorine unloading rack and the gauge side of the nearest rail of the track serving the facility shall not be less than prescribed in Schedule I.
20 The horizontal distance between the centre point of the chlorine unloading rack or of the tank car, when it is at the unloading position, and a main roadway or street or the gauge side of the nearest rail of any track other than a track serving the facility shall not be less than prescribed in the following paragraphs:
(a) not less than 50 feet from a main track or from the curb line of a main roadway or street; and
(b) not less than 20 feet from a passing track or any track other than a main track or a track serving the facility.
PART IIIPiping and Transfer Equipment
21 (1) Except as provided in section 22, only steel pipe, fittings and valves shall be used. They shall not be less than 3/4 inch nominal diameter and shall comply with the standards prescribed in Tables I and II of Schedule II, or other standards recommended by The Chlorine Institute and approved by the Commission.
(2) All joints exceeding a nominal diameter of 1 1/4 inches shall be welded.
(3) Gaskets, joint compound and valve packing shall comply with the recommendations of The Chlorine Institute as contained in its Pamphlet No. 6, dated January 18, 1962, and amendments thereto.
(4) All welding operations shall be performed by a welder approved by the provincial government concerned for the type of welding to be done.
22 Notwithstanding section 21, the flexible connection between the unloading rack and the tank car shall comply with The Chlorine Institute Drawing No. 118, as shown in Schedule III, or other arrangement recommended by The Chlorine Institute and approved by the Commission.
23 A shut-off valve shall be installed in the discharge line near the discharge side of the flexible connection prescribed in section 22. It shall not be used for throttling purposes and shall either be fully open or fully closed. A second shut-off valve shall be installed in the discharge line near the process tank or other receiving vessel.
24 (1) Prior to being placed in service for the first time and prior to being returned to service after a repair, the piping system shall receive a hydrostatic and a pneumatic test as prescribed in subsections (2) and (3).
(2) The piping system shall be tested at a hydrostatic pressure of 300 psig. It shall be able to withstand this test for 30 minutes without leakage or a failure of any kind.
(3) After the hydrostatic test, the piping system shall be thoroughly dried and cleaned, then tested for leaks with dry air at 150 psig, as recommended by The Chlorine Institute in its Pamphlet No. 6, dated January 18, 1962, and amendments thereto.
(4) A dated and signed record of the latest hydrostatic and dry air tests shall be retained on the owner’s or operating company’s file for examination by an officer of the Commission when so requested.
25 An expansion chamber shall be provided between shut-off valves or other locations where liquid chlorine may become trapped. The capacity of the expansion chamber shall not be less than 20 per cent of the capacity of the pipeline it is intended to protect.
26 (1) If the normal tank car pressure is not adequate for unloading purposes, it may be increased by means of clean dry air by a procedure commonly known as “Air Padding” in accordance with the recommendations contained in The Chlorine Institute Pamphlet No. 4, dated May 17, 1961, and amendments thereto, and with the requirements prescribed in subsections (3) and (4).
(2) Clean, dry, inert gas may be used for “Padding” if the written consent of the chlorine supplier is obtained.
(3) The total pressure of air or inert gas padding plus chlorine vapour in the tank car at the maximum temperature attained during unloading shall not exceed the following:
(a) 125 psig, for tank cars equipped with safety valves set to discharge at 225 psig; and
(b) 200 psig, for tank cars equipped with safety valves set to discharge at 375 psig.
(4) The air or inert gas used for padding shall be free from oil and other foreign substances and shall be dried to a dew point, measured at atmospheric pressure, of minus 40°F or below.
27 (1) Piping shall be carried on permanent supports of steel or concrete or on some other supporting system approved by the Commission.
(2) Ground-based supports for pipelines more than four feet above ground shall be mounted on footings which extend below the frost line or which rest on bedrock.
(3) Pipelines exposed to damage by vehicular traffic shall be protected by guard rails or curbs of concrete or metal.
(4) Provision shall be made in pipelines for expansion, contraction, jarring, vibration and settling.
(5) Ground-based, steel supports for pipelines more than four feet above ground should be coated or otherwise protected against fire damage by a method recommended by the National Fire Protection Association to provide the support with a fire resistance rating of not less than two hours.
28 (1) Pipelines running parallel to a track shall not be closer than 10 feet to the gauge side of the nearest rail of that track and shall comply with subsection (2).
(2) Except as provided in section 29, pipelines located on the railway right-of-way within 20 feet of a track shall be installed in accordance with any one of the following paragraphs:
(a) pipelines may be enclosed in a reinforced concrete or steel trench fitted with a recessed removable cover flush with the ground; the trench shall be provided with a drain to prevent water from collecting;
(b) pipelines may be carried on an overhead pipe bridge fabricated from steel or concrete and providing a minimum clearance of not less than 13 feet above ground, except that the installation of pipelines over tracks shall not be undertaken without the express approval of the Commission in writing;
(c) that portion of a pipeline between the unloading rack and a process or similar building located on the unloading site may be enclosed by a chain link fence not less than five feet high.
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