D.M. Consunji, Inc.,

Project : Tirona Pumping Station and 35ML Reservoir in Kawit,Cavite

Subject : Reservoir -Mechanical

Date : July 24,2015

Specifications:

I. THICKNESS OF STEEL PIPES:

Nominal

Finished

Inside

(mm)

Minimum

Steel Plate

Thickness

(mm)

Outside

(mm)Factory

200 200 4.76 209.52 70.00

250 250 4.76 259.52 70.00

300 300 4.76 309.52 70.00

350 350 4.76 359.52 63.00

400 400 4.76 409.52 56.00

450 450 4.76 459.52 50.00

600 600 4.76 609.52 42.00

700 700 6.35 712.7 39.00

900 900 6.35 912.7 34.00

II. BURIED STEEL PIPES & FITTINGS

Buried steel pipes shall conform to AWWA C200 with protective coatings in accordance

with AWWA C203 - Coal-Tar Protective Coatings for Steel Water Pipelines - Enamel and Tape

- Hot Applied. The pipes inside surfaces shall be epoxy lined in accordance with AWWA C-210.

Linings & Coatings

1. Epoxy Lining

Interior surfaces of all steel pipes, fittings, and specials shall be cleaned and lined in the shop with

coal tar epoxy at 406 microns dry film thickness in conformity with AWWA C210.

The pipe ends at 50 mm. distance shall be left bare where field welded joints shall be carried out.

Field lining of welded ends shall be accomplished after testing of the jointed pipes.

2. Coal Tar Enamel Coating

All pipes, fittings and specials shown on the plans to be laid on trenches or below-ground

shall be coated with single application of coal tar enamel followed by single thermoglass

wrapping (Double Coat/Double Wrap) in accordance with AWWA C203.

III. EXPOSED/ABOVE STEEL FITTINGS

Interior surfaces of all steel pipes, fittings, and specials shall be cleaned and lined in the shop

with coal tar epoxy at 406 microns dry film thickness in conformity with AWWA C210.

IV. SUCTION AND DISCHARGE PIPING WORKS

For pump station suction and discharge pipeworks, the steel pipes shall comply with AWWA C200

and the provisions of AWWA C203 on the lining of the inside surfaces.

All suction and discharge pipes laid above-ground as shown on the plans shall be coated with

rubber alky paint in accordance with AWWA C218 at 200 microns DFT. Final top coating

of blue shall be in accordance with MAYNILAD standard.