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Course 904 - Oil and Gas Well Inspection

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hoses

Hoses, Pins and Keepers

Hose and Fittings

The purpose of this inspection is to ensure that hoses used around the rig are in good working order and used properly.

Hose

List each hose with a description of location and purpose so that another worker could locate it. Inspect based on the instructions below and note on the form.

Service Rating

Each hose must be clearly marked with its pressure rating and service limitations. Some hoses may not be rated for high temperature or corrosive materials.

Any hoses that are being used for purposes other than what they were designed for should be addressed.

Hose and Fittings (Continued)

fitings

Hose Body

  • The hose should not be crushed or kinked or otherwise deformed.
  • Check for swelling of the hose body that would indicate that the hose had been over heated or over pressured.
  • Small cracks on the outside layer are common; however, cracks that expose multiple layers may need to be addressed and should be noted on the inspection.
  • Look for signs of stretching or pulling of the hose. This may cause undue stress on the fittings.
  • Check for damage that may have been caused by the hose being snagged along its length.

End Fittings

Carefully inspect each end of the hose to verify the integrity of the connection.

  • The fitting should be seated all the way down into the hose and show no signs of movement.
  • Fitting clamps and bands should be tight and located in the proper position on the fitting.
  • The end fittings themselves should not be damaged and any locking mechanisms should be fully functional.
  • Hose fittings and connections should be tight and not leaking.
  • Fittings must be rated for the same service as the hose and be installed correctly.

Hose and Fittings (Continued)

Hose Runs

  • Check the run of the hose to ensure it is not rubbing or chaffing on sharp edges.
  • Check the hose run to ensure it does not interfere with doors, walkways, or overhead clearance.
  • Hoses should not be run in rig ditches and should be protected from chemicals or heat sources such as steam piping or welding.
  • Hoses should never be stretched tight from fitting to fitting, the hose must be allowed to expand and contract during use without putting a pull load on the fitting.

Storage

When not in use, hoses should be coiled and stored properly to prevent damage to the body of the hose or to the end fittings.

  • Large diameter hoses should be coiled flat without kinks; they should not be transported in a junk basket where heavy iron equipment may damage them.
  • Smaller hoses can be coiled and hung for storage and transport.
  • Make sure that all hoses have been properly drained or flushed prior to storage or transport.
  • If hoses have been used for hydrocarbon or chemical service, they should be plugged to prevent spills or employee contact from residue left in the hose.

Third Party Equipment

Third party hose runs should be checked as well to make sure they don’t interfere with rig operations or create unsafe conditions for the rig crew.

Safety Chain and Whip Check

Conduct this inspection to ensure that hoses used around the rig are properly snubbed to prevent injury should the fitting fail and the hose whip out of control.

Good practice recommends that hoses longer than 3 feet should have secondary restraint if they are:

  • high pressure, high volume hoses (for example: rotary hoses, vibrating hoses, cement hoses, circulating hoses)
  • compressed gas hoses (air hoses ¾” and larger, nitrogen transfer / service hoses)
  • energized fluid lines (steam hoses, water blasting, test pump lines)

Hose

List each hose with a description of the location and purpose so that another worker could locate it. Inspect based on the instructions below and note on the form the: hose size and rating, clamp location, attachment point, and condition of whip checks.

hobbles

Safety Chain and Whip Check (Continued)

Safety Chains and Cables (Hobbles)

Ensure that the chain clamp is installed at the proper location on the hose. Most vibrating/ rotary hoses have the clamp area marked 2 to 3 feet in from the coupling. The small eye on the coupling is for fit up of the connection only and is not a lifting eye and should not be used for secondary restraint. Safety chains should be attached securely to a dedicated pad eye or structural member that can withstand the impact of a sudden failure. Clamps used overhead should be placed where they do not interfere with running lines or tugger hoist lines. Restraints should never be placed around the coupling.

Whip Checks

Whip checks are light weight cable devices used for smaller hoses in various applications. Air powered tools that use large volume air hoses should always be equipped with whip checks at each connection. The whip check should be installed before each connection is made and the cable should be installed to minimize the amount of slack in the cable. Whip check cables should not be used to hang hoses nor should they be used for any other purpose than intended. Whip checks should not be used for high pressure, high volume applications where safety chains or cables should be used. Whip checks can be used for moderate pressure less than 200 psi in smaller diameter less than 3 inch hose. Whip checks should be inspected for corrosion or damage.

Pins and Keepers

Be sure to conduct this inspection to make sure that pins and keepers are installed correctly for efficient and safe operation. For more information see: factory specifications from manufacturer.

Location/Type/Number

Note the locations and type of pins and keepers on the rig. Write the quantity inspected for many in one location.

Pin Diameter

Check that the point taper on the pin is completely through the assembly with the outside diameter of the pin in contact with the internal diameter of the connection.

Pin Length

Check that pins are not so long that they can be bent or otherwise damaged making them difficult or impossible to remove.

Pin Condition

Check that the pin head has a stop collar or stop pin to prevent the pin from being driven too far into the connection.

Make sure that the head of the pin is not mushroomed to the point that fragments could be broken off as the pin is being driven. Also inspect the pointed end of the pin for damage caused by excessive hammering.

If the pin must be hammered to the point where mushrooming occurs, the connection is misaligned.

Pins and Keepers (Continued)

Pin Installation

Check that pins are not in an area where they can be impacted by equipment or pipe which may shear the safety keeper and drive the pin out of the connection. For example, pins in the mast across from the racking board may be struck by a lost stand of pipe and driven out of their connection.

In these situations, the pin should be installed so that any impact will drive the pin into the connection rather than out. In addition, the pin should not present a snag hazard for hanging or hoist lines on the rig.

There are generally two types of safety keepers used on assembly pins:

  • safety pin
  • safety bolt

They should be inspected for proper fit and condition.

Keepers should not have other items attached to them, and should not present a snag hazard.

Pins and Keepers (Continued)

safety pin

Safety Pins

Confirm that the pins are inspected for damage and in good shape prior to installation. If the keeper is in good shape when installed, any damage noted during the inspection would indicate some type of problem or interference. Check that the keeper is not hard against the shoulder of the pin pocket, but is loose and free to move without binding.

Safety Bolts

Check that the safety bolts are sized to fit the pin safety hole closely, without binding, and without the need for numerous washers.

The bolts should be long enough to get the entire nut onto the bolt with at least 2 threads showing through the nut.

Check that the safety bolt is not installed without nuts, particularly in overhead applications.

Instructions

Before beginning this quiz, we highly recommend you review the module material. This quiz is designed to allow you to self-check your comprehension of the module content, but only focuses on key concepts and ideas.

Read each question carefully. Select the best answer, even if more than one answer seems possible. When done, click on the "Get Quiz Answers" button. If you do not answer all the questions, you will receive an error message.

Good luck!

1. When inspecting hoses and fittings on the rig, each hose must be clearly marked with _____.

2. When inspecting hoses and fittings on the rig, be sure to check for all of the following defects, except _____.

3. When inspecting hose runs on the rig, be sure to check that hoses are _____ when not in use.

4. When inspecting hose runs on the rig, make sure that all hoses have been _____ prior to storage or transport.

5. When inspecting safety bolts in overhead applications, check that the safety bolt is not installed without _____.


Have a great day!

Important! You will receive an "error" message unless all questions are answered.