Hose Assembly Inspection and Testing for Highway Tanks

7.2.10 Hose assembly inspection and testing

The hose testing requirements specified in Clauses to shall apply to product delivery and

vapor return hose assemblies that are temporarily connected between the tank or any tank-mounted

accessory and the point of supply or receipt during loading or off-loading but shall not apply to hose

assemblies that are part of the piping system and are pressure tested in accordance with Clause

Despite Clauses 7.1.1 and 8.1.1, a competent facility that has knowledge of the hose testing requirements

need not be registered to test and inspect a hose assembly.

Personnel performing the inspections and test specified in Clauses and, respectively,

shall be trained in product and hose safety, inspection and test procedures, and rejection criteria. A record

of this training shall be kept in the employment files of those personnel.

Hose assemblies shall be inspected annually for

(a) damage to the hose cover that exposes the reinforcement;

(b) kinked, flattened, or permanently deformed wire braid;

(c) soft spots when not under pressure, bulging under pressure, or loose outer covering;

(d) damaged, slipping, or excessively worn hose couplings;

(e) loose or missing bolts or fastenings on bolted hose coupling assemblies; and

(f) deteriorated legibility or absence of the serial or identification number and HAWP.

Each hose assembly shall be pressure tested annually in accordance with the following:

(a) A hose assembly having any damage identified in Clause shall be taken out of service and

not be pressure tested until repaired.

(b) The test pressure shall be

(i) for CSA-certified hose assemblies, not less than 2400 kPa (350 psi);

(ii) for gravity off-load hose assemblies (drop hoses), not less than 69 kPa (10 psi);

(iii) for vapour recovery hose assemblies on TC 406 tanks and the equivalent and substitute tanks

identified in CSA B621, not less than 69 kPa (10 psi);

(iv) for vacuum hose assemblies on tanks loaded by vacuum, used exclusively for vacuum loading,

and marked “vacuum only” in place of HAWP as specified in Clause, not be less than

69 kPa (10 psi); and

(v) not applicable to vacuum hoses that are

(1) an integral part of a boom assembly or vacuum system on tanks loaded by vacuum; and

(2) used exclusively for vacuum loading; and

(vi) for all other hose assemblies, the greater of 120% of the marked HAWP of the hose assembly and

518 kPa (75 psi).

(c) The following shall not be used to pressurize the hose assembly:

(i) compressed gas;

(ii) compressed air;

(iii) flammable liquid; or

(iv) corrosive liquid.

Note: Water is the recommended test fluid.

(d) The requirements of Item (c) shall not apply to

(i) hose assemblies used to handle aircraft fuel;

(ii) CSA-certified hose assemblies; or

(iii) hose assemblies used in refrigerated liquefied gas service that are manufactured and

documented as conforming to CSA B51 or ASME B31.3 and marked “CSA B51” or “ASME

B31.3” by the hose assembly manufacturer.

(e) Provisions shall be made to protect personnel during testing should failure occur.

(f) To pass the pressure test, the hose assembly shall hold the pressure without bulging, distortion, or

leaks for at least 5 min when isolated from the pressure supply.

A hose assembly that has passed the inspection and pressure test shall be marked in a manner that will

endure the rigours of daily use, either by stamping on an end fitting or by using a securely attached metal

tag or washer, in letters not less than 5 mm (0.2 in) high, with the month and year of the test and

inspection. The depth and location of the stamping shall not degrade the pressure rating of the hose. A

hose assembly not already marked in accordance with the requirements of Clause or shall

be marked as specified in Clause

Following an inspection or test, a report outlining the results shall be prepared by the facility performing

the hose testing and inspection and shall be retained for at least two years by this facility and by the hose

assembly owner. The report need not comply with Clause 7.3 but shall identify the name and address of

the facility responsible for the inspection and test, the hose assembly serial or identification number, the

HAWP, the date, and the nature of the inspection or test.

A hose assembly that is held in stock following an inspection and test shall be marked as described in

Clause with the letters “IS” and the date that it is returned to service, if it is visually inspected in

accordance with Clause immediately prior to its return to service. The next annual inspection and

pressure test shall be performed within twelve months of this in-service date. If the hose assembly is stored

for more than a year, the test and inspection reports shall be retained by the owner until the next annual

inspection and test are completed.

New or repaired hose assemblies shall be visually inspected as specified in Clause, tested as

specified in Clause, and marked as specified in Clause or

The HAWP for a hose assembly that is not already marked may be determined by referring to

documentation provided by the hose and coupling manufacturer or supplier or by inspecting the hose

and couplings for markings applied during manufacturing that indicate the maximum working pressure

for the component. A HAWP that corresponds to the maximum working pressure of the lowest rated

component of the hose assembly, or the maximum anticipated pressure that the hose is expected to see in

service, whichever is less, shall be marked on a hose that is successfully tested in accordance with

Clause Hose assemblies for which ratings cannot be determined shall not be marked. If not

already marked on the hose assembly, markings shall also be applied to indicate the serial number or

identification number of the hose assembly.

7.2.11 Structural inspection

Tank trailers shall be subjected to an inspection of all structural components, structural welds, structural

components in spaces between or adjacent to compartments in compartmentalized tanks, and areas of

high stress or stress concentration in the tank and frame for cracks and other defects as follows:

(a) Prior to inspection, the tank shall be decontaminated as prescribed in Clause 7.1.3.

(b) The jacketing and insulation shall be removed as necessary, or inspection ports in the jacketing and

insulation shall be used to conduct the required inspection.

(c) Areas to be inspected shall include but are not restricted to

(i) points of attachment between the tank wall and frame components for the suspension system,

upper coupler, and landing gear;

(ii) points of attachment between the ring stiffeners and frame components for the suspension

system, upper coupler, and landing gear;

(iii) seams near the bottom center of the tank;

(iv) critical areas of shape transition such as the bottom of the circumferential seam on dual conic


(v) structural compartments or connecting structures;

(vi) discontinuities in the frame or tank wall;

(vii) areas surrounding a center bottom outlet; and

(viii) any areas identified by the manufacturer or assembler in accordance with Clause 5.10.13.

(d) Welds in critical areas shall be inspected for cracks using dye penetrant or magnetic particle testing.

(e) Following inspection, repair of any defects found, and subsequent re-inspection, the jacketing and

insulation shall be replaced in a manner that will facilitate future inspection of critical areas.

(f) Following the inspection, a written report shall be completed by the inspection facility in accordance

with Clause 7.3. The report shall include a drawing identifying all critical joints and high stress areas