ASME B16.47 Series B Flanges | API 605 | 26 to 60 Inch

ASME B16.47 Series B flanges join large-bore piping where you need a dependable connection without the added weight and cost of heavier designs. The standard covers sizes from NPS 26 through NPS 60. You will find these flanges in water transmission lines, oil and gas pipelines, power plants, refineries, and other industrial systems that move material through wide piping. PM Industries manufactures, supplies, and stocks them in a range of sizes, classes, and materials.

Series B flanges weigh less and run more compact than Series A flanges of the same size and pressure class. That smaller profile, paired with a tighter bolt circle, makes them easier to lift, install, and maintain. On big projects the weight savings add up fast, and lower material cost, quicker installation, and simpler alignment during construction all follow from it. We produce these flanges mainly as weld neck and blind types, with pressure classes covering 75, 150, 300, 400, 600, and 900, matched to the service the line will see. Common materials include carbon steel, alloy steel, and stainless steel grades, and the right mix of class, facing, and bore depends on your operating conditions. Our team will help you confirm the fit before you order.

A flange is only as good as its seal. Series B flanges hold tight when paired with the correct gasket, bolting, and facing type, which keeps large piping networks free of leaks. Material selection, face preparation, and sound installation practice carry most of the work here. Get those right and the joint stays reliable across its rated pressure and temperature range. Pick Series B when standard compliance, dependable sealing, and sensible cost all matter and extreme mechanical rigidity is not the main driver. Within their rated limits, these flanges perform well across medium to high-demand systems, and for wide piping that has to go together quickly and stay sealed, they strike a practical balance between performance and price.

PM Industries is a manufacturer, supplier, and stockist of ASME B16.47 Series B flanges. We keep stock on hand, back every order with material test certificates, and ship to project deadlines. Tell us your size, class, facing, and material, and we will quote it.

Specification ASME B16.47 Series B Flange

Standards	ANSI/ASME B16.5, B16.48, ANSI Flanges, GOST Flanges, DIN Flanges, EN-1092, B16.47 Series A & B, ASME Flanges, EN Flanges, AWWA Flanges, BS Flanges.
JIS Standard	5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
DIN FLANGES	DIN 2527, 2627, 2631, 2656, 2576, 2673, 2629, 2628, 2566, 2641, 2637, 2655, 2634, 2636, 2632, 2633, 2638, 2642, 2573, 2635.
Pressure Rating	Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Types	Threaded, Plate, Screwed, Forged.
Supporting material	Gasket, Ring Joint, Flange Bolts
Size range	1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Production technique	Forged, machined and Heat treated
Available Flange Type	Weld Neck Flanges, RTJ Flanges, Slip On Flanges, Spectacle Blind Flanges, Flanges Gaskets, Square Flanges, Standard Insert Flanges, High Hub Blinds Flanges, Flat Flanges, forged flanges, Weldo / Nipo Flanges, Jacket Insert Flanges, Tongue groove Flanges, Blind Flanges, Socket Weld Flanges, Large diameter Flanges, Long Weld Neck Flanges, Spacer Blinds, SWRF Flanges, SORF Flanges, Angle Face Rings Flanges, Spades Ring Spacers Flanges, WNRF Flanges, Screwed Flanges, Insert Flanges, flanges bolts, cf flange, Lap Joint Flanges, ASME B16.36 Orifice Flanges, Plate Flange, Expander Flanges, Ring Type Joint Flanges, Loose Flanges, Reducing Flanges, puddle flange, Threaded Flanges, blank flange, vacuum flange.
Connect Type/ Flange Face Type	Ring Type Joint (RTJ), Flat Face (FF), Tongue & Groove, Small Male-Female (SMF), Lap-Joint Face (LJF), Raised Face (RF), Large Male-Female (LMF), Small Tongue.
Custom design	As per your drawing
Test	Direct-reading Spectrograph, X-ray detector, UItrasonic flaw detector, Magnetic particle detector, Hydrostatic testing machine.
Origin	Indian / USA / Korean / West Europe / Japan
Pressure Class	PN 6 TO PN 100
Thickness	Normal Pipe Size ≤ 18
Bore Diameter	Normal Pipe ≤ 10
High Temperature	Above 200°C (400°F) For Class 150 Or Above 400°C (750°F)
Low Temperature	Above -29 Degree C (−20°F)
Coating/Surface Treatment:	Zinc Plated, Anti-rust Paint, Oil Black Paint, Yellow Transparent, Cold and Hot Dip Galvanized.
European/African/Russian Standard Flanges	Available
Gaskets Types	Full Face, Metallic Ring, Flat Ring Gasket
Marking Standard	Name of Manufacturer
	Schedule
	Type of Flange Facing
	Pressure Class
	Nominal Pipe Size, etc
Test Certificates	EN 10204/3.1B, NACE MR0103, NACE MR0175
	Raw Materials Certificate
	100% Radiography Test Report
	Third Party Inspection Report, etc

Flange Type Available

Dimensions of ANSI B16.47 Flange

Thickness	Drilling	Weight
Nom Size	OD	Weld Neck	Blind	OD of RF	Dia at Base	LTH	Dia Bevel	Bolt Circle	Bolt Length	HoleDia	# of Holes	Weld Neck	Blind
O	C	C	R	X	Y	A	(1)	(2)
26	34.25	2.63	2.63	29.5	26.62	4.69	26	31.75	8.75	1.38	24	300	702
28	36.5	2.75	2.75	31.5	28.62	4.88	28	34	9	1.38	28	345	833
30	38.75	2.88	2.88	33.75	30.75	5.32	30	36	9.25	1.38	28	400	982
32	41.75	3.13	3.13	36	32.75	5.63	32	38.5	10.5	1.62	28	505	1237
34	43.75	3.19	3.19	38	34.75	5.82	34	40.5	10.5	1.62	32	540	1384
36	46	3.5	3.5	40.25	36.75	6.13	36	42.75	11	1.62	32	640	1676
38	48.75	3.38	3.38	42.25	39	6.13	38	45.25	11	1.62	32	720	1819
40	50.75	3.5	3.5	44.25	41	6.38	40	47.25	11	1.62	36	775	2040
42	53	3.75	3.75	47	43	6.69	42	49.5	11.5	1.62	36	890	2381
44	55.25	3.94	3.94	49	45	6.94	44	51.75	12	1.62	40	990	2717
46	57.25	4	4	51	47.12	7.25	46	53.75	12	1.62	40	1060	2961
48	59.5	4.19	4.19	53.5	49.12	7.5	48	56	12.5	1.62	44	1185	3348
50	61.75	4.32	4.32	55.5	51.25	7.94	50	58.25	13.25	1.88	44	1270	3716
52	64	4.5	4.5	57.5	53.25	8.19	52	60.5	13.75	1.88	44	1410	4156
54	66.25	4.69	4.69	59.5	55.25	8.44	54	62.75	14	1.88	44	1585	4639
56	68.75	4.82	4.82	62	57.38	8.94	56	65	14.25	1.88	48	1760	5132
58	71	5	5	64	59.38	9.19	58	67.25	14.75	1.88	48	1915	5675
60	73	5.13	5.13	66	61.38	9.38	60	69.25	15	1.88	52	2045	6154