API Std 650 - Shell Nozzles (in)

• American Petroleum Institute (API)

standards

• API Std 650 - Standard for Welded Tanks for Oil Storage

 

API Std 650 - Shell Nozzles (in) - flanged fitting
Size of Nozzle (NPS)	Outside Diameter of Pipe (OD)	Nominal Thickness of Flanged Nozzle Pipe Wall [a]   \(t_n\)	Diameter of Hole in Reinforcing Plate     \(D_R\)	Length of Side of Reinforcing Plate [b] or Diameter   \(L=D_o\)	Width of Reinforcing Plate       \(W\)	[c] Min. Dist. from Shell to Flange Face     \(J\)	[c] Min. Dist. from Bottom of Tank to Center of Nozzle (Regular Type) [d] \(H_N\)	[c] Min. Dist. from Bottom of Tank to Center of Nozzle (Low Type) \(C\)
48	48	[e]	48 1/8	96 3/4	117	16	52	48 3/8
46	46	[e]	46 1/8	92 3/4	112	16	50	46 3/8
44	44	[e]	44 1/8	88 3/4	107 1/4	15	48	44 3/8
42	42	[e]	42 1/8	84 3/4	102 1/2	15	46	42 3/8
40	40	[e]	40 1/8	80 3/4	97 3/4	15	44	40 3/8
38	38	[e]	38 1/8	76 3/4	92 3/4	14	42	38 3/8
36	36	[e]	38 1/8	72 3/4	88	14	40	36 3/8
34	34	[e]	34 1/8	68 3/4	83 1/4	13	38	34 3/8
32	32	[e]	32 1/8	64 3/4	78 1/2	13	36	32 3/8
30	30	[e]	30 1/8	60 3/4	73 1/2	12	34	30 3/8
28	28	[e]	281/8	56 3/4	68 3/4	12	32	28 3/8
26	26	[e]	26 1/8	52 3/4	64	12	30	26 3/8
24	24	0.50	24 1/8	49 1/2	60	12	28	24 3/4
22	22	0.50	22 1/8	45 1/2	55 1/4	11	26	22 3/4
20	20	0.50	20 1/8	41 1/2	50 1/2	11	24	20 3/4
18	18	0.50	18 1/8	37 1/2	45 3/4	10	22	18 3/4
16	16	0.50	16 1/8	33 1/2	40 3/4	10	20	16 3/4
14	14	0.50	14 1/8	29 1/2	36	10	18	14 3/4
12	12 3/4	0.50	12 7/8	27	33	9	17	13 1/2
10	10 3/4	0.50	10 7/8	23	28 1/4	9	15	11 1/2
8	8 5/8	0.50	8 3/4	19	23 1/4	8	13	9 1/2
6	6 5/8	0.432	6 3/4	15 3/4	19 1/2	8	11	7 7/8
4	4 1/2	0.337	4 5/8	12	15 1/4	7	9	6
3	3 1/2	0.300	3 5/8	10 1/2	13 1/2	7	8	5 1/4
2 [f]	2 3/8	0.218	2 1/2	-	-	6	7	[h]
1 1/2 [f]	1.90	0.200	2	-	-	6	6	[h]
1 [f]	1.315	0.250	-	-	-	6	6	[h]
3/4 [f]	1.05	0.218	-	-	-	6	6	[h]

 

API Std 650 - Shell Nozzles (in) - threaded and socket welded couplings
Size of Nozzle (NPS)	Outside Diameter of Pipe (OD)	Nominal Thickness of Flanged Nozzle Pipe Wall [a]   \(t_n\)	Diameter of Hole in Reinforcing Plate     \(D_R\)	Length of Side of Reinforcing Plate [b] or Diameter   \(L=D_o\)	Width of Reinforcing Plate       \(W\)	[c] Min. Dist. from Shell to Flange Face   \(J\)	[c] Min. Dist. from Bottom of Tank to Center of Nozzle (Regular Type) [d] \(H_N\)	[c] Min. Dist. from Bottom of Tank to Center of Nozzle (Low Type) \(C\)
3 [g]	4.250	Coupling	4 3/8	11 1/4	14 1/4	-	9	5 5/8
2 [f]	3.000	Coupling	3 1/8	-	-	-	7	[h]
1 1/2 [f]	2.500	Coupling	2 5/8	-	-	-	6	[h]
I [f]	1.750	Coupling	1 7/8	-	-	-	5	[h]
3/4 [f]	1.375	Coupling	1 1/2	-	-	-	4	[h]

 

• [a] For extra-strong pipe, see ASTM A53 or ASTM A106 for other wall thicknesses; however, piping material must conform to API Std 650 4.5.
• [b] The width of the shell plate shall be sufficient to contain the reinforcing plate and to provide clearance from the girth joint of the shell course.
• [c] Unless otherwise specified by the Purchaser, the nozzle shall be located at the minimum distance but shall also meet the weld spacing requirements of API Std 650 5.7.3.
• [d] The \(H_N\) dimensions given in this table are for Appendix A tank designs only; see API Std 650 5.7.3 to determine minimum \(H_N\) for basic tank designs.
• [e] See Table API Std 650 5-7b, Column 2.
• [f] Flanged nozzles and couplings in pipe sizes NPS 2 or smaller do not require reinforcing plates. \(D_R\) will be the diameter of the hole in the shell plate, and Weld A will be as specified in Table API Std 650 5-7b, Column 6. Reinforcing plates may be used if the construction details comply with rein¬forced nozzle details.
• [g] A coupling in an NPS 3 requires reinforcement.
• [h] See API Std 650 5.7.3.