8/18/2019 Boquillas techo

1/1

5-68 API STANDARD 650

all of the dimensional requirements for slip-on welding flanges with the exception that it is acceptable to omit the

extended hub on the back of the slip-on or weld neck flanges. Raised face flanges shall be provided for nozzles with

attached piping. Flat face flanges shall be provided for roof nozzles used for the mounting of tank accessories.

5.8.5.7 Threaded roof nozzles shall conform to Figure 5.20 and Table 5.15a and Table 5.15b.

5.8.6 Rectangular Roof Openings

5.8.6.1 Rectangular roof openings shall conform to Figure 5.17 and Figure 5.18 and/or this section. The effects o

loads (other than normal personnel access) applied at the roof opening and supporting roof structure shall be

considered. Examples of such loads may include fall protection anchorage, hoisting, or personnel retrieval. The roo

structure and plate around the opening shall be reinforced as necessary.

5.8.6.3 Rectangular openings, other than shown in Figure 5.17 and Figure 5.18, and openings larger than indicated

shall be designed by an engineer experienced in tank design in accordance with this standard. Hinged covers

prescribed in Figure 5.18 may not be used on roofs designed to contain internal pressure. Flanged covers prescribed

in Figure 5.17 may not be used on tanks with internal pressures (acting across the cross sectional area of the tank

roof) that exceed the weight of the roof plates. This section applies only to fixed steel roofs.

Dimensions in millimeter

Column 1 Column 2 Column 3 Column 4 Column 5

BoquillaNPS

Diamentro exterior delcuello de la boquilla

Diametro del hoyo en laplancha del techo o

plancha de refuerzo  D P 

Altura minimade la boquilla

 H  R

Diametro exterior dela plancha de

refuerzoa  D R

11/2 48.3 50 150 125

2 60.3 65 150 175

3 88.9 92 150 225

4 114.3 120 150 275

6 168.3 170 150 375

8 219.1 225 150 450

10 273.0 280 200 550

12 323.8 330 200 600

a  Plancha de refuerzo no son requeridas para boquilla NPS6 o mas pequeño pero puede ser usado si desea . 

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