API Std 650 - Shell Nozzles (mm)

• American Petroleum Institute (API)

standards

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

 

API Std 650 - Shell Nozzles (mm) - 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	1219.2	[e]	1222	2455	2970	400	1325	1230
46	1168.4	[e]	1172	2355	2845	40	1275	1180
44	1117.6	[e]	1121	2255	2725	375	1225	1125
42	1066.8	[e]	1070	2155	2605	375	1175	1075
40	1016.0	[e]	1019	2050	2485	375	1125	1025
38	965.2	[e]	968	1950	2355	350	1075	975
36	914.4	[e]	918	1850	2235	350	1025	925
34	863.6	[e]	867	1745	2115	325	975	875
32	812.8	[e]	816	1645	1995	325	925	820
30	762.0	[e]	765	1545	1865	300	875	770
28	711.2	[e]	714	1440	1745	300	825	720
26	660.4	[e]	664	1340	1625	300	750	670
24	609.6	12.7	613	1255	1525	300	700	630
22	558.8	12.7	562	1155	1405	275	650	580
20	508.0	12.7	511	1055	1285	275	600	525
18	457.2	12.7	460	950	1160	250	550	475
16	406.4	12.7	410	850	1035	250	500	425
14	355.6	12.7	359	750	915	250	450	375
12	323.8	12.7	327	685	840	225	425	345
10	273.0	12.7	276	585	720	225	375	290
8	219.1	12.7	222	485	590	200	325	240
6	168.3	10.97	171	400	495	200	275	200
4	114.3	8.56	117	305	385	175	225	150
3	88.9	7.62	92	265	345	175	200	135
2 [f]	60.3	5.54	63	-	-	150	175	[h]
1 1/2 [f]	48.3	5.08	51	-	-	150	150	[h]
1 [f]	33.4	6.35	-	-	-	150	150	[h]
3/4 [f]	26.7	5.54	-	-	-	150	150	[h]

  

API Std 650 - Shell Nozzles (mm) - threaded and socket welded couplings
Size of Nozzle (NPS)	Outside Diameter of Pipe (OD)	Nominal Thickness of Flanged Nozzle Pipe Wall [a]   \(ft_n\)	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]	108.0	Coupling	111.1	285	360	-	225	145
2 [f]	76.2	Coupling	79.4	-	-	-	175	[h]
1 1/2 [f]	63.5	Coupling	66.7	-	-	-	150	[h]
I [f]	44.5	Coupling	47.6	-	-	-	125	[h]
3/4 [f]	35.0	Coupling	38.1	-	-	-	100	[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.