Abstract： ASME B16.1:1998 pdf download.CAST IRON PIPEFLANGES AND FLANGED FITTINGS Classes 25, 125, and 250. (c) For 90 dcg. long-radius elbows with side ou those over 45 deg. and up to 90 deg.. inclusive, shall have the same ccntcr-to-face dimensions...

ASME B16.1:1998 pdf download.CAST IRON PIPEFLANGES AND FLANGED FITTINGS Classes 25, 125, and 250.

(c) For 90 dcg. long-radius elbows with side ou&t, the center-to-face dimensions of the side outlet shall be the

same as dimension A in Tablcs 3, 5, and 7 for a straight-size 90 deg. elbow corresponding to the size of the

largest opening.

(d) Special-degree elbows ranging from I deg. to 45 deg., inclusive, shall have the same ccnter-to-face dimensions as those for 45 deg. elbows; those over 45 deg. and up to 90 deg.. inclusive, shall have the same ccntcr-to-face

dimensions as those for 90 deg. elbows. The angle designation of an elbow is the angle between the flange faces.

6.3.3 Tees. Crosses, and Laterals

(a) Thc center-to-face dimensions for straight-size tees and crosses, with or without side outlet, and laterals

arc shown in Tables 3, 5, and 7.

(b) Reducing lees and reducing crosses, with or without side outlet, and reducing laterals, NPS 16 and smaller,

shall have the same center-to-face dimensions as straight-size linings shown in Tables 3, 5. and 7 corresponding

to the size of the largcst opening. For NPS IS and larger, if the outlet of a reducing tee; the branch of a

reducing lateral: or the largest outlet of a reducing side outlet Icc, reducing cross, and reducing side outlet

cross is the same size or smaller than given in Tables 3, 5, and 7 (short body pattern), the center. to-lace

dimensions shown in these Tables shall be used. If a branch or any outlet is larger than shown in Tables 3, 5, and 7. the center-to-face dimensions shall be the same as for the straight-size fitting shown in Tables 3. 5. and 7

corresponding w the size of the largest opening. Tees, crosses, and laterals, reducing on the run only, shall have the same center-to-face dimensions as straight-size fittings shown in Tables 3, 5, and 7 corresponding to the size of the largest opening.

(c) Tees reducing on both runs are generally known as bull-head ices and have the same center-to-face dimensions

as straight-size fittings corresponding to the size of the outlet.

6.3.4 True Vs. Center-to-face dimensions for straight-size true Ys are shown in Tables 5 and 7. Reducing sizes are considered special and should be made to suit conditions.

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