Insert Flanges | DIN 2642 | EN 1092-1

PM Industries manufactures, supplies, and stocks Insert Flanges in a range of materials, sizes, and pressure ratings. An insert flange is a two-piece flange assembly consisting of an inner insert, which is welded or fitted to the pipe, and an outer backing ring that slides over the pipe and backs the insert at the joint face. The two components work together at assembly to form the complete flange connection.

The design is used in specific piping applications where a conventional one-piece weld neck or slip-on flange presents practical difficulties. Jacketed piping is the most common example. In a jacketed pipe system, the inner process pipe runs inside an outer jacket pipe. Getting a conventional flange onto the inner pipe while the jacket is in place is either impossible or requires cutting and re-welding the jacket at every flange location. Insert flanges solve that problem by allowing the insert to be fitted to the inner pipe independently, with the backing ring sliding into position from outside the jacket.

Jacketed piping service is the primary engineering driver for insert flanges. Jacketed pipe carries heat-sensitive or viscosity-sensitive process fluids in the inner pipe, with a heating or cooling medium circulating in the annular space between inner and outer pipes. The inner pipe must connect to process equipment flanges at each end, while the jacket must also terminate and connect at each flange location. Insert flanges handle the inner pipe connection without requiring the jacket to be cut at every connection point, which simplifies both initial fabrication and subsequent maintenance.

Bolt hole alignment is a practical advantage during installation. The backing ring is free to rotate around the insert before the bolts are tightened, which allows bolt holes to be lined up with the mating flange without rotating the entire pipe spool. That flexibility speeds installation in field situations where pipe spools arrive pre-fabricated and rotating the assembly to align bolt holes isn't practical.

Material selection covers corrosive and high-temperature process requirements. Stainless steel insert flanges in 316L are common in chemical processing jacketed piping. Duplex stainless grades cover more aggressive corrosive service. Nickel alloy inserts in Inconel 625 or Hastelloy C-276 cover the most demanding chemical and high-temperature jacketed process applications.

Insert flanges are available with full material certification to applicable ASTM and ASME standards. Contact PM Industries for material selection, pipe size, pressure rating, and pricing.

Specification Standard Insert Flanges

Standards	ANSI/ASME B16.5, B16.48, GOST, DIN, EN-1092, B16.47 Series A & B, AWWA, BS Flanges
JIS Standard	5K, 10K, 16K, 20K, 30K, 40K, 63K
DIN Flanges	DIN 2527, 2627, 2631, 2656, 2576, 2673, 2629, 2628, 2566

Flanges are Available in Following Materials

Stainless Steel	SS 201, SS 202, SS 301, SS 304, SS 304L, SS 310, SS 310S, SS 316L, SS 316TI, SS 317, SS 317L, SS 321, SS 347, SS 409, SS 409M, SS 409L, SS 410, SS 410S, SS 420, SS 430, SS 431, SS 441, SS 444, SS 446, SS 17-4PH, SS 904L.
Duplex Steel	UNS S32205, UNS S31803 Flange
Super Duplex Steel	UNS S32750, UNS S32760 Flanges
Carbon Steel	Carbon steel A105 Flanges, A36 Flanges, IS 2062 Flanges, A350 LF2 Flanges, F42 Flanges, F52 Flanges, F56 Flanges, F60 Flanges, F65 Flanges, F70 Flanges, F80 Flanges, IBR flanges, A694 Flanges, SS400, SF440, ST37-2 Flanges, S235JrG2 Flanges, P250GH Flanges, C22.8 Flanges, etc.
Alloys Steel	Alloy 20, F1, F5, F9, F11, F22, F91 Flanges
Copper Alloys	Cu-Ni 70/30, Cu-Ni 90/10, C 24000, C 75700, C 51100, C 22000, C 27200, C 21000, C 26800, C 52100, C 77000, C 52000, C 11000, C 74500, C 23000, C 28000, C 12200, C 76400, C 51900, C 75400, C 26000, C 51000, C 10200, C 27000
Nickel Alloys	Nickel 200, 201
Inconel	Inconel 600, 601, 625, 718, 800, 825, X-750
Monel	Monel 400, k500
Hastelloy	Hastelloy C-22, C-276, C-4, X
Titanium	Grade 1, 4, 5(Ti 6Al-4V), 6(Ti 5Al-2.5Sn), 7, 11, 6Al-2Sn-4Zr-2Mo, Grade 12, 6Al-6V-25n, Grade 23(Ti 6AL-4V ELI), 8Ai-1Mo-1V, Grade 5 ELI, Grade 9(3Al-2.5V), 6Al-7Nb.
Aluminium	6063, 1100, 6082 A96082, 1050, 2017, 2024 A92024, 7050 A97050, 5083 A95083, 2014A A92014, 2011 A92011, 6061 A96061 A86061, 5754, 7085, 2050, 7071 7020, 7178, 5052 A95052, 7150, 7075 A97075 A87075, 7575, 2219, 7175
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
High Temperature	Above 200°C (400°F) For Class 150 Or Above 400°C (750°F)
Low Temperature	Above -29 Degree C (−20°F)
Production technique	Forged, machined and Heat treated
Custom design	As per your drawing
Origin	Indian / USA / Korean / West Europe / Japan
Pressure Class	PN 6 TO PN 100
Coating/Surface Treatment:	Zinc Plated, Anti-rust Paint, Oil Black Paint, Yellow Transparent, Cold and Hot Dip Galvanized.
European/African/Russian Standard Flanges	Available
Test	Direct-reading Spectrograph, X-ray detector, UItrasonic flaw detector, Magnetic particle detector, Hydrostatic testing machine.
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

DIMENSION - ASME B16.5 STANDARD INSERT FLANGES

ø	D	b	g	m	J	k	Holes	l	Kg.
1/2"	88,9	11,1	34,9	30,2	22,3	60,3	4	15,9	0,400
3/4"	98,4	12,7	42,9	38,1	27,7	69,8	4	15,9	0,700
1"	107,9	14,3	50,8	49,2	34,5	79,4	4	15,9	0,800
1 1/4"	117,5	15,9	63,5	58,8	43,2	88,9	4	15,9	1,100
1 1/2"	127,0	17,5	73,0	65,1	49,5	98,4	4	15,9	1,400
2"	152,4	19,0	92,1	77,8	62,0	120,6	4	19,0	2,200
2 1/2"	177,8	22,2	104,8	90,5	74,7	139,7	4	19,0	3,600
3"	190,5	23,8	127,0	107,9	90,7	152,4	4	19,0	4,100
3 1/2"	215,9	23,8	139,7	122,2	103,4	177,8	8	19,0	5,200
4"	228,6	23,8	157,2	134,9	116,1	190,5	8	19,0	5,600
5"	254,0	23,8	185,7	163,6	143,8	215,9	8	22,2	6,300
6"	279,4	25,4	215,9	192,1	170,7	241,3	8	22,2	7,500
8"	342,9	28,6	269,9	246,1	221,5	298,4	8	22,2	12,600
10"	406,4	30,2	323,8	304,8	276,3	361,9	12	25,4	18,500
12"	482,6	31,7	381,0	365,1	327,1	431,8	12	25,5	28,000
14"	533,4	34,9	412,7	400,0	359,1	476,2	12	28,6	36,000
16"	596,9	36,5	469,9	457,2	410,5	539,7	16	28,6	46,000
18"	635,0	39,7	533,4	504,8	461,8	577,8	16	31,7	50,000
20"	698,5	42,9	584,2	558,8	513,1	635,0	20	31,7	64,000
22"	749,3	46,0	641,2	609,6	564,4	692,1	20	34,9	72,000
24"	812,8	47,6	692,1	663,6	615,9	749,3	20	34,9	89,000

WEIGHT CHART OF STANDARD INSERT FLANGES

Nominal Size	Diameter		Flange I.D	No. of holes	Flange Dia	Thk of Flange	Dia of Bolt Circle	Dia of Bolt Holes	Approx.Weight
DN	ISO	DIN	D5	BN	D	b	K	d2	KG/PCS
10	-	14	14.5	4	90	16	60	14	0.7
	17.2	-	17.7	4	90	16	60	14	0.69
15	-	20	21	4	95	16	65	14	0.77
	21.3	-	22	4	95	16	65	14	0.77
20	-	25	26	4	105	18	75	14	1.06
	26.9	-	27.6	4	105	18	75	14	1.05
25	-	30	31	4	115	18	85	14	1.27
	33.7	-	34.4	4	115	18	85	14	1.25
32	-	38	39	4	140	18	100	18	1.86
	42.4	-	43.1	4	140	18	100	18	1.83
40	-	44.5	45.5	4	150	18	110	18	2.12
	48.3	-	49	4	150	18	110	18	2.09
50	-	57	58.1	4	165	20	125	18	2.78
	60.3	-	61.1	4	165	20	125	18	2.74
65	76.1	-	77.1	8	185	22	145	18	3.48
80	88.9	-	90.3	8	200	24	160	18	4.33
100	-	108	109.6	8	235	24	190	22	5.82
	114.3	-	115.9	8	235	24	190	22	5.61
125	-	133	134.8	8	270	26	220	26	7.91
	139.7	-	141.6	8	270	26	220	26	7.6
150	-	159	161.1	8	300	28	250	26	10.12
	168.3	-	170.5	8	300	28	250	26	9.58
175	193.7	-	196.1	12	350	32	295	30	14.45
200	219.1	-	221.8	12	375	34	320	30	16.9
250	-	267	270.2	12	450	38	385	33	27.28
	273	-	276.2	12	450	38	385	33	26.51
300	323.9	-	327.6	16	515	42	450	33	36.38
350	355.6	-	359.7	16	580	46	510	36	52.83
	-	368	372.2	16	580	46	510	36	50.24
400	406.4	-	411	16	660	50	585	39	74.71
	-	419	423.7	16	660	50	585	39	71.44
500	508	-	513.6	20	755	52	670	42	86.87
600	610	-	616.5	20	890	54	795	48	121.84
700	711	-	716	24	995	58	900	48	150.93
800	813	-	818	24	1140	64	1030	56	219.08
900	914	-	920	28	1250	70	1140	56	271.16
1000	1016	-	1022	28	1360	78	1250	56	344.95