Stainless- and Duplex steel Flanges

Our stock program comprises of

ANSI – FLANGES
• Welding-neck, Slip-on, Blind, Socket-weld, Screwed, Lap‑joint and Long welding-neck flanges.
• Dimensions and tolerances in accordance with ANSI/ASME B16.47, series A and B, MSS-SP44, API 605, BS 3293, ISO – 7005-1.
• Pressure classes from 150, up to and including 600 lbs. Sizes from 0,5˝ N.B up to and including 36˝.
• Pressure classes from 900, 1500 and 2500 Sizes from 0,5˝ N.B up to and including 16˝.

 
MATERIAL GRADES
Austenitic Stainless Steel      
ASTM / ASME – SA 182 F304
F304L
F304H
F316
F316L
F316TI
F321
F321H
F347
F347H
F310
F317
F317L
F44
 UNS S30400
S30403
S30409
S31600
S31603

S32100
S32109
S34700
S34700
S31000
S31700
S31703
S31254
Duplex Steel      
  F51
F53
F55
   S31803
S32750
S32760
DIN – FLANGES
• Welding-neck, Slip-on, Blind- and Lap-joint flanges.
• Dimensions in accordance with DIN and‑ISO 7005-1.
• Pressure classes from PN 6 up to and -including PN 420.
• Sizes from DN 10 up to and including DN‑1200.

 

MATERIAL GRADES
Austenitic Stainless Steel      
DIN 17440 EN 10088 w.nr. 1.4301
1.4306
1.4541
1.4550
1.4401
1.4436
1.4404
1.4435
1.4571
1.4841
1.4438
1.4439
1.4539
  
Duplex Steel      
SEW 400/V.D. TÜV 418 F51
F53
F55

 

1.4462  
EXOTIC AND NICKEL ALLOYS
W.Maass Nederland stocks billets and forgings in a wide variety of nickel and titanium alloys.

 
SPECIALS

Our own factory and in-house machine shop enable us to produce Flanges, Forgings, Nozzles, Fittings and other products to customer requirements on an emergency basis.

 
QUALITIY ASSURANCE, CONTROL AND TESTING

We are familiar with additional testing and -certification in accordance with national and international standards and specific customers' requirements.

Since 1988, our company is ISO 9001 certified.

All our products are manufactured by reputable manufacturers approved by all major Chemical, Petrochemical and 
Offshore companies.