Manufacturer, stockist and supplier · Supplying GCC, Southeast Asia, Europe, United States, United Kingdom & India

ramesh@brighttubes.in · +91 98200 74585

Stainless Steel · Flanges · ASTM A182 / ASME SA182 F304

SS 304 Stainless Steel Flanges

In short: SS 304 stainless flanges are forged to ASTM A182 F304 in weld-neck, slip-on, blind, socket-weld, lap-joint and threaded types, to ASME B16.5 and B16.47 dimensions in Class 150 to 2500.

S30400
UNS number
7.93
density, g/cm³
3.1 / 3.2
EN 10204 certificates
7
SS 304 product forms
Quote SS 304 flanges →Sizes and weights
SS 304 flanges: specification designationsASTM A182 / ASME SA182 F304 DESIGNATIONS FOR SS 304 FLANGES ASTM A182ASME SA182 F304 Marked on every piece with heat number and size; matched to the 3.1 / 3.2 certificate.
Calculated values for estimating; actual weights vary within tolerances.

Why this combination

Why SS 304 in flanges

Balanced corrosion resistance, formability and costNon-magnetic when annealedExcellent weldability and deep drawingTough down to cryogenic temperatures

Flanges are where a piping system gets its pressure rating: an F304 flange's rating comes from ASME B16.5 tables for its class and temperature. SS 304 flanges are used on water, food and general chemical lines without significant chlorides.

For welded joints in corrosive service, F304L avoids sensitisation; dual F304/F304L flanges are common. Bolting is usually B8 or B7, depending on temperature and corrosion.

Specification

How to specify SS 304 flanges

NPS ½" – 24" (B16.5), 26" – 60" (B16.47 Series A/B); Class 150, 300, 600, 900, 1500, 2500; EN 1092-1 PN 6 – PN 100 on request

SS 304 flanges ASTM A182 / ASME SA182 F304
SS 304 flanges: ASTM A182 / ASME SA182 F304
Specification
ASTM A182 / ASME SA182 F304
UNS
S30400
EN / W.Nr.
1.4301
Dimensions
ASME B16.5 (½–24 in), B16.47 Series A / B (26 in and up); EN 1092-1 on request
Facing
Raised face, flat face or ring-type joint

Sizes and weights

SS 304 flanges sizes, weighed at 7.93 g/cm³

Other sizes on request. For general flanges information, such as manufacturing routes and end finishes, see the flanges guide.

NPS ½" – 24" (B16.5), 26" – 60" (B16.47 Series A/B); Class 150, 300, 600, 900, 1500, 2500; EN 1092-1 PN 6 – PN 100 on request

Chemistry

SS 304 composition

UNS
S30400
EN / W.Nr.
1.4301 · X5CrNi18-10
Density
7.93 g/cm³
PREN
18 – 20
SS 304 Stainless Steel chemical composition, % (ASTM A240)
ElementLimit, %Why it matters
C0.07 max
Mn2.00 max
P0.045 max
S0.030 max
Si0.75 max
Cr17.5 – 19.5
Ni8.0 – 10.5
N0.10 max

Limits per ASTM A240; other product forms and specifications differ slightly. Your order's specification and edition govern.

0%5%10%15%20% Mn Cr Ni
Main alloying elements of SS 304 Stainless Steel: bars show the permitted range (ASTM A240).

Questions

About SS 304 flanges

What bolting is used with SS 304 flanges?

Typically ASTM A193 B8 stainless or B7 alloy studs with matching A194 nuts, chosen by temperature, corrosion and gasket type.

What pressure classes are SS 304 flanges made in?

ASME Class 150, 300, 600, 900, 1500 and 2500, with ratings that decrease as temperature rises.

From enquiry to dispatch

How a SS 304 flanges order runs

  1. 01 EnquiryGrade, specification, size, quantity
  2. 02 ReviewChecked against your standard
  3. 03 InspectPMI, dimensions, TPI if required
  4. 04 CertifyEN 10204 3.1 / 3.2, heat traceable
  5. 05 ShipPacked and documented for the destination

Need SS 304 flanges?

Send size, quantity, specification and destination. We reply with availability, certificates and delivery.

Request a quote →SS 304 grade page
Request a Quote Call
WhatsApp