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We have received an order for hot dip galvanized threaded flange from Malaysia. In order to increase the service life of the flange, the customer requested that the flange surface be hot dipped galvanized to improve corrosion resistance. The factory colleagues added a galvanizing process after completing the production of the flange. The customer was very satisfied after inspection.

What is Hot Dip Galvanized Threaded Flange

Hot-Dip galvanized is a process in which the flanges are immersed in a bath of molten zinc to prevent the steel from corroding. This is done after a pervasive chemical cleaning to remove rust, oil, and mill scale for the flange. A rule of thumb says that it generally corrodes at a 1/30 rate of bare carbon steel.

Hot dip galvanized Threaded flange is connected to pipes or other equipment through threads. It is a detachable connection method. In the pipeline system, threaded flanges play the role of connecting, sealing and supporting pipelines. Carbon steel threaded flanges are widely used in industrial fields such as petroleum, chemical, electric power, metallurgy, and pharmaceuticals to connect various pipelines, valves, pumps and other equipment.

Hot dip galvanized threaded flanges are renowned for their ability to withstand the harshest environments. We offer HDG Flanges in Norms: EN 1092-1,ASME B16.5 etc.

Materials & Grades of Threaded Flange

Size Range	1/2″ – 24″ / DN15 – DN600
Pressure Rating	Class 150, 300, 600, 900, 1500, 2500lb
Standard	ASME B16.5, EN1092-1
Carbon Steel	ASTM A105 / A105N
Low Temp Carbon Steel	ASTM A350 LF2/LF3
Pipeline Steel	ASTM A694 F42 / 46 / 56 / 60 / 65
Alloy Steel	ASTM A182 F11 / 12 / 5 / 9 / 91 / 92

ASEM B16.5 Class 150 Threaded Flange Dimensions & Weight

Nominal Pipe Size		A	C	D	E	F	G	H	I	J	Weight
	mm	mm	mm	mm	mm	mm	mm	Holes	mm	mm	kg/ piece
1/2	21.3	88.9	11.20	15.70	15.70	30.20	35.10	4	15.70	60.45	0.39
3/4	26.7	98.6	12.70	15.70	15.70	38.10	42.90	4	15.70	69.85	0.56
1	33.4	108.0	14.20	17.50	17.50	49.30	50.80	4	15.70	79.25	0.78
1-1/4	42.2	117.3	15.70	20.60	20.60	58.70	63.50	4	15.70	88.90	1.03
1-1/2	48.3	127.0	17.50	22.40	22.30	65.00	73.15	4	15.70	98.60	1.32
2	60.3	152.4	19.10	25.40	25.40	77.70	91.90	4	19.10	120.7	2.06
2-1/2	73.0	177.8	22.40	28.40	28.40	90.40	104.6	4	19.10	139.7	3.28
3	88.9	190.5	23.90	30.20	30.20	108.0	127	4	19.10	152.4	3.85
3-1/2	101.6	215.9	23.90	31.75	31.75	122.2	139.7	8	19.10	177.8	4.81
4	114.3	228.6	23.90	33.30	33.30	134.9	157.2	8	19.10	190.5	5.3
5	141.3	254.0	23.90	36.60	36.60	163.6	185.7	8	22.40	215.9	6.07
6	168.3	279.4	25.40	39.60	39.60	192.0	215.9	8	22.40	241.3	7.45
8	219.1	342.9	28.40	44.50	44.50	246.1	269.7	8	22.40	298.5	12.1
10	273.0	406.4	30.20	49.30	49.30	304.8	323.9	12	25.40	362.0	16.5
12	323.8	482.6	31.75	55.60	55.60	365.3	381.0	12	25.40	431.8	26.2
14	355.6	533.4	35.10	57.15	57.15	400.1	412.7	12	28.40	476.3	34.6
16	406.4	596.9	36.60	63.50	63.50	457.2	469.9	16	28.40	539.8	44.8
18	457.2	635	39.60	68.30	68.30	505.0	533.4	16	31.75	577.9	48.9
20	508.0	698.5	42.90	73.15	73.15	558.8	584.2	20	31.75	635.0	61.9
24	609.6	812.8	47.80	82.60	82.60	663.4	692.2	20	35.10	749.3	86.9

Uses and Applications

ZIZI is pleased to introduce to you that we are a professional company engaged in the production and processing of pipes and fittings, hot dip galvanized threaded flange able to meet the various requirements of customers in the following fields:

● Construction

● Bridges

● Petrochemical industry

● Shipbuilding industry

● Engineering

● Offshore and onshore services

● Power generation industry

● Food processing industry

● Oil and gas industry

27 11 月, 2024