SECTION 10 Skid Mounted Equipment

1001. General

1. A typical list of skid-mounted equipment operations includes the following.

(1) Utilities and instrument air

(2) Sea water

(3) Chemical injection

(4) Pressure Wash

(5) Nitrogen generation and charging

(6) Cementing skid

(7) Hydraulics/Pneumatic pumping units

(8) Well test equipment

(9) Other temporary equipment

2. Skid mounted equipment are to comply with the following requirements.

(1) Pressure retaining equipments are to be in accordance with Sec 8.

(2) Piping systems are to be in accordance with Ch 5.

(3) Materials are to be in accordance with Ch 3, Sec 1.

(4) Welding and non-destructive examination are to be in accordance with Ch 3,

(5) Electrical systems are to be in accordance with Ch 6, Sec 1.

(6) Control systems are to be in accordance with Ch 6, Sec 2.

Sec 2.

1002. Skid structures

1. Skid structures for drilling system equipment packaged units are to be sufficiently rigid to support the mounted equipment and piping and, as required, to permit lifting during shipment without dam- age to the equipment or piping.

2. Structural design calculations for skid units with a center of gravity height of more than 1.5 m, or a maximum operating weight in excess of 10 tons calculated in dry conditions, are to be submitted to the Society.

3. Lifting attachment and/or pad eyes, including the attachment to the skid structure are

to be de-

signed in accordance with the requirements of API RP 2A WSD and Pt 9, Ch 2, Sec 9 of

Rules for the Classification of Steel Ships.

4. Load testing of the lifting attachment and/or pad eyes, including the attachment to the ture is to be performed in accordance with Ch 3, 203.

skid struc-

1003. Drip pans

1. Drip pans are to be provided to contain liquid spills and leaks from skid-mounted equipment and piping, and to drain the liquid with adequate slope into open drain systems.

2. A minimum 150 mm coaming around the entire perimeter of a skid is to be provided.

3. Spill containment with less than 150 mm coaming arrangement is subject to special consideration.

4. Calculations showing sufficient spillage containment for the skid are to be submitted for verification.

5. Skid beams that extend above the drip pan may be considered as meeting the coaming requirement, provided that the drip pan is seal-welded to the skid beams.

64 Guidance Relating to the Rules for the Classification of Mobile Offshore Drilling Units 2015