Flange safety operation and maintenance regulations

Flange safety operation and maintenance regulations

Solid float PVC boom

1 purpose

Ensure normal and safe operation of the equipment, ensure the personal safety of equipment operators, and meet production needs.

2 Scope of application

Only applies to solid float type booms.

3 duties

The Asset Management Department is responsible for compiling, modifying, and supplementing the rules for the safe operation and maintenance of equipment, and supervising and evaluating the implementation of the regulations.

The operator must operate the equipment strictly in accordance with the operating procedures.

4 specific content

4.1 Oil boom dragging oil

Commonly used U (V) and J-type drag bis vessels (see below), can be used single vessel towing, tow-sided tape may be a single vessel drag sweep width of up to several meters to tens of meters. Double-barreled trailers can be used up to several hundred meters. Towing speed should not be too fast, generally < 1.5 m / s, with 0.3-0.4 m /s . When the boom is long, the total drag must be calculated. The total drag must not exceed 1 times the tensile force of the boom. It should also be determined based on the tensile strength of the boom.

The total towing force T is calculated as follows:

T = 1000FV 2 ... ( 1 ) T total drag NF boom underwater resistance area ? F = underwater depth of the boom × sweep width V relative velocity of water flow to the boom m / s can be based on drag force T And dragging speed V determines the total power required for tugboats NN=TV ( W )... ( 2 ) The general experience is N=0.0037T ( KW )

When a double ship is towing, the power per ship is not less than 0.5N .

4.2 Fixed arrangement of booms (see figure below)

Boom length (estimate)

Length of O -bar fence boom ≈ (Captain + width + 50m ) × 2 ... ( 3 ) Length of C -bar fence boom ≈ Captain + width +60 to 100m ... ( 4 ) Not allowed Where the anchor is, the minimum distance for the boom from the boat is 2m .

The auxiliary devices for the fixed installation of the boom are: floating isolation devices, positioning floating buckets, support rings, struts, anchors, anchor lines, floats, quick joints, tractors, etc. (use the following description) The number of anchors, anchors, and anchor ropes are as follows:

Calculate the total anchorage force T total of the boom by formula ( 1 ) :

Number of anchors n = T total / T anchor ... ( 5 ) T total - total anchor anchor force NT anchor - single anchor anchor force

N- number of anchors

The anchoring force of a single anchor is related to the type of the anchor, the size of the anchor, and the quality of the water bottom. The clay soil in the bottom soil is better, and the sand and mud are in turn inferior. Single anchors take 4 to 20 times their weight . Generally, an anchor (one-way flow) can be set for a 40m long boom to increase the anchorage and reduce the number of anchors as appropriate.

The connection between anchor and boom is shown below:

The anchor rope is approximately 30 ° above the water surface or the anchor rope is 3 times water depth +5m . The anchor rope should have sufficient strength. The anchor rope can use polyethylene rope and polypropylene rope which are lighter than water, and can be replaced by chain and steel wire rope. It can also use chain or steel wire rope for the bottom section of water, and the other use plastic rope. When using plastic ropes, anti-friction treatment should be applied to each joint to prevent the anchor rope from breaking.

Sometimes it is possible to replace the anchors with concrete, etc. The weight of the weight should be more than three times the anchoring force.

4.3 Launch, towing and deployment of booms

( 1 ) Connection of the oil boom

Factory booms are 20 m (or 10 m) is a generally onshore or on the deck of the oil boom is connected to a desired length.

Method joint connection: each of the fitting hole with the later, and the cross connector can be fixed platen, a solid anchorage and the lower two nylon rope.

Laying the fixed booms and shore connections should be used to ensure that the floating spacer means when the water level changes, booms and shore without friction and prevent leakage of oil spill. The track of the floating isolation device is vertical, and the bank is sloped and soil treatment should be performed. If it is a slowly changing bank slope, the boom should be fixed at a point far above the maximum working water level away from the water edge, supplemented with oil-absorbing material, but the boom is susceptible to wear and should be handled with care.

( 2 ) Launch of boom

When the boom is placed from the shore or the boat to the water, the tugboat shall cooperate with or put the boat in reverse against the popularity of the gallop, and shall be thrown into the water section by section to avoid disturbance. Before the boom is put into use, it should be well-organized, pay attention to the direction when investing, and it cannot be twisted after being dropped . The head is difficult to bring it forward in the water. When served, or to the water recovery booms booms easily shore and ship in injury, such as a roller, like grooves on the slip angle of the retractable projection is safe and labor-saving.

( 3 ) Towing of the boom

When towing, pay attention to the length of the rope. Boom should be maintained more than 15 meters, or 5 times the distance from the end of the ship deck level. When towing the boom, it is best to use a special tractor. When there is no tractor, the trailer rope can be directly tied to the anchoring seat of the boom or tied on the reinforcing belts on both sides of the boom head (note that both sides are Strengthen the belt together.) Do not use a boomerang floater to tow and secure the boomerang on the top handle used to lift the boom.

Straight drag towing speed should be calculated based on the strength of the boom and the required boat power can also be calculated.

T straight = 75LV2 ... ( 5 ) T straight - straight dragging required power N L - length of dragging boom m V - relative speed of water flow in the boom

(4) arranged to expand the oil boom and the boom is deployed in advance detailed scheme. Expansion should consider the size and direction of the trend . A section of the boom can be towed to a predetermined point and fixed with an anchor, allowing it to drift downstream. Then, the vessel anchors the boom at the next anchor point at a predetermined location, and repeats the positioning step by step. When the flow rate is small, the boom at the main point, the turning point or the connection point can be anchored, and the middle anchor can be cast on the boom. After the boom has been fully developed, the position of the anchor can be further adjusted so that the boom can be arranged in a more correct shape. The ship can use the anchor rope to lift the anchor and drag the anchor (or drag the boom along with it ) to move.

4.4 Flange Recycling and Storage

The recovery process of the boom is contrary to the deployment, but it must be combined with the storage method.

When recovering, unfasten the anchor ropes of the anchors on the column. After the cap ropes are unfastened, pull the anchors out of the chain ropes. Then disconnect the connection between the booms and pull the booms and anchors to the dock. Or shore. Be careful not to drop the bolt into water when attaching or detaching the joint.

The boom storage can be placed on shore boats. But easy to damage the water recycling up booms, preferably so shore alongside the vessel side with rollers, slides. The boom can be discharged and stacked on the shore (be careful not to disturb) and can also be wound with a winch. When the solid floater boom is stored with a winch, the volume is relatively large, but the mechanical floater can be more convenient for retracting. You can use cranes and other devices to lift the boom from side to side on board the ship, but care should be taken not to hang it on the dam and to hang it on the anchor and lift the boom. Remove all anchor ropes from the boom before reclaiming it on shore. Storage should be ventilated to avoid direct sunlight.

The oil boom is stored in water and is convenient for frequent intermittent operations. Single-end mooring, the free flow of the oil boom and the drift of the wind direction, and the boom is hard to damage. When the water area is not wide, it can be folded into a zigzag shape (see the figure below). Straight section along the water, downstream is better, you can also use the structure instead of anchor fixed boom. Between the booms, there must be no contact between the boom and the structure to prevent it from being worn out.

Booms when storing water, does not necessarily store all the recovery of the anchor from the boom, with a ship-based cap with the anchor rope again comes onto the boom and storage, it is also a boat with another Lifting the back anchor behind the boom, this method can be used to easily transport a boom between the place of deployment and the storage location. Individual anchors do not have to move the anchors to the boat, simply dragging the caps. Before the arrival of typhoon and strong typhoon will certainly be in the water on the shore to shift the oil boom.

The information in this article comes from the Internet and was reorganized and edited by China Rescue Equipment Network.