USCGC Alder Cargo Hatch Welding

Statement of Work

USCGC ALDER (WLB 216)

Cargo Hold Hatch Cofferdam Drain Piping Crop & Renew

1. Purpose and Scope

. KTR shall renew necessary portions of the cargo hold hatch cofferdam drain piping

located in compartment 2-30-0-AA, Cargo Hold.

2. Deliverables and Performance Requirements

. Protective measures: The KTR must furnish and install all protective measures IAW

SFLC Std Spec 0000, paragraph 3.3.3 (Vessel component, space, and equipment

protection).

. Interferences: The KTR must handle all interferences IAW SFLC Std Spec0000,

(Interferences).

. Contamination prevention: The KTR must take all precautions to prevent

contamination of personnel and spaces IAW all applicable Federal, state, and local

regulations.

. Fluid handling: The KTR must remove and dispose of removed fluids from the

affected piping system, IAW all applicable Federal, state, and local regulations. Do not

drain any fluids into any spaced, bilge, or exterior location.

. Piping renewal particulars: The KTR must accomplish the following tasks, using

Coast Guard Drawing 225–WLB–528–001, REV K as guidance:

o Crop out necessary length of piping (3” & 2” diameter), to include all necessary

funnel pieces of the cofferdam system.

o Fabricate necessary piping arrangement previously cropped IAW CG Drawing.

o Install all fabricated piping to include all required gaskets/seals IAW CG

Drawing.

o KTR must provide a means of sealing any open piping while any portion of the

system is open (i.e.: upstream valve blind flange).

. Pipe hangers: Furnish, fit, and install new pipe hangers, as necessary.

. Pipe labeling: The KTR must label affected piping as follows:

o Name of the piping system service.

o Destination, where feasible.

o Direction of flow, indicated by an arrow three inches long pointing away from

the lettering.

. Leak Test: After completing all authorized mechanical (i.e. threaded, bolted, etc.)

joint repairs, the Contractor must test the affected piping system's operation using the

system fluid at normal operating pressure. Ensure zero visible leakage from or

deformation of mechanical parts by repairing all leaks and discrepancies.

. Touch-up preservation: The KTR must prepare and coat all new and disturbed

surfaces to match existing adjacent surfaces in accordance with SFLC Std Spec 6310,

(Touch-ups and minor coating repairs.)

. Piping insulation installation: The KTR must install new insulation materials over

the exposed pipe surfaces at thicknesses appropriate to the application and temperature

ranges specified in ASTM F683 Tables.