This discussion covers the sealing surface types of various flanges and their applicable scope

  • Release time: 2025-11-07

In industries such as petroleum, chemical, and power, the sealing reliability of pipeline systems is directly related to production safety and environmental protection, making the selection of the sealing surface type of titanium flanges a core issue. Titanium flanges, as pipeline connection components made of non-ferrous titanium or titanium alloys, are tightly connected by holes and bolts, with a gasket used between the flanges for sealing. These seemingly simple connecting components play a crucial role in complex industrial environments. With the continuous development of industrial technology, the sealing surface types of titanium flanges have become increasingly diverse, each type possessing unique structural characteristics and applicable scope. This article will elaborate on the sealing surface types of various flange types and their applicable scopes.

 

Sealing surface types of various flanges and their applicable ranges

HGT 20592-2009 PN series (European system)

 

Flange type Sealing surface PN
2.5 6 10 16 25 40 63 100 160
PL Flange(PL) Raised Face(RF) DN10-DN2000 DN10-DN600 —
Flat Face Full Face(FF) DN10-DN2000 DN10-DN600 —
Slip On Flange(SO) Raised Face(RF) — DN10-
DN300
DN10-DN600 —
Male Face and Female Face(FM) (M) — DN10-DN600 —
Tongue Face and Groove Face(T)(G) — DN10-DN600 —
Flat Face Full Face(FF) — DN10-DN300 DN10-DN600 —
Weld Neck Flange(WN) Raised Face(RF) — DN10-DN2000 DN10-DN600 DN10-DN400 DN10-DN350 DN10-DN300
Male Face and Female Face(FM)(M) — DN10-DN600 DN10-DN400 DN10-DN350 DN10-DN300
Tongue Face and Groove Face(T)(G) — DN10-DN600 DN10-DN400 DN10-DN350 DN10-DN300
Flat Face Full Face(FF) — DN10-DN2000 —
Ring Joint Face(RJ) — DN15-DN400 DN15-DN300
Socket Weld Flange(SW) Raised Face(RF) — DN10-DN50 —
Male Face and Female Face(FM)(M) — DN10-DN50 —
Tongue Face and Groove Face(T)(G) — DN10-DN50 —
Threaded Flange(Th) Raised Face(RF) — DN10-DN150 —
Flat Face Full Face(FF) — DN10-DN150 —

 

Flange type and its code

flange type and its code

 

Type of sealing surface and its code

type of sealing surface and its code

 

With the rapid development of industries such as chemical, petroleum, and marine engineering, the requirements for titanium flange sealing technology will continue to increase. Innovations in sealing surface design, advancements in materials science, and improvements in manufacturing processes will jointly drive titanium flange sealing technology towards greater efficiency, reliability, and economy. As a key component in pipeline connections, the sealing surface technology of titanium flanges directly impacts the overall level and reliability of my country's industrial equipment. In the future, with the continuous advancement of titanium material technology, the application scope of titanium flanges will further expand, providing more reliable solutions for various engineering projects.

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