Anchors, Bolts, Nuts, Washers, and Screws

Size (mm)

Under

40

50

80 100 150 200

250

300

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Maximum Hanger

Spacing (meters)

2

2.75

3 3.5 4.25

5 5.75 6.50 7.0

__________________________________________________________________________

Nominal Pipe

One and

Size (Inches)

Under

1.5

2

3

4

6

8

10

12

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Maximum Hanger

Spacing (Feet)

7

9

10

12

14

17

19

22

23

3.3.3

Anchors, Bolts, Nuts, Washers, and Screws

Install where required for securing the work in place. Sizes, types, and

spacings of anchors and bolts not indicated or specified shall be as

required.

3.4

PROTECTIVE COATINGS FOR ABOVEGROUND CARBON STEEL PIPING

For aboveground piping, coat piping and appurtenances in accordance with

Section 09971 EXTERIOR COATING OF STEEL STRUCTURES.

3.4.1

Damaged Materials

For both above and below ground piping, fittings, couplings, irregular

surfaces, damaged areas of pipe coating, and existing piping affected by

the Contractor's operations shall be clean, dry, grease free, and primed

before application of tape. Waterproof shrink sleeves may be provided

using electric heating method in lieu of tape and shall overlap the pipe

coating not less than 150 mm 6 inches. Pipe coating and adhesive undercoat

surfaces to be wrapped with tape shall be primed with a compatible primer

prior to application of tape. Primer shall be as recommended by tape

manufacturer and approved by pipe coating manufacturer. [Apply pipe

coating on piping under piers with finish paint coat as approved by pipe

coating system manufacturer.]

3.4.2

Pipe Coating

For both above and below ground piping, residual material from pipe coating

shall be pressed into the break or trimmed off. Apply tape spirally with

one-third overlap as tape is applied. A double wrap of one full width of

tape shall be applied at right angles to the axis to seal each end of the

spiral wrapping.

3.4.3

Fitting Coating

For both above and below ground piping, stretch and apply first layer of

tape to conform to component's surface. Apply and press a second layer of

tape over first layer of tape.

3.4.4

Flange, Valve and Irregular Surface Coating

For both above and below ground piping, apply coal tar base coating to a

minimum dry film thickness of 0.80 mm 30 mils.

3.4.5

Exterior Coatings for Underground Piping

Except as otherwise specified, protective coating shall be applied

SECTION 15194N

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