FLANGE
The Easiest All-In-One Single Pass Flange Tightening Solution
Torque a flange in 15 minutes or less!
The DuraSquirt® Flange System allows a flange to be torqued in a single pass, utilizing all of the benefits of Direct Tension Indicators (DTIs). This is based on an improved Flange Bolt-Up study, sponsored by BP America and the Pressure Vessel Research Council (PVRC).
In the early 1990s, BP America and The Pressure Vessel Research Council (PVRC) sponsored the University of Akron, Ohio to develop a way to improve flange bolt-up procedures, using experimentally determined elastic interaction coefficients.1 The study resulted in a way to fully torque a flange, in a single tightening pass, while achieving uniform bolt stresses around the flange. The groundbreaking procedure was made possible by determining and compensating for elastic interaction between all bolts within a flange.
Elastic interaction is the phenomenon that occurs between a group of bolts as tightening initializes and progresses throughout the group. As each bolt is tightened, other bolts in the group may tighten or loosen, due to dynamically changing forces within the flange assembly.
Flange Bolting 101 – Elastic Interaction
what makes single pass possible!
Benefits
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SIGNIFICANTLY FASTER THAN THE ASME PCC-1 LEGACY BY 70%+
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RELIABLY PRODUCES A LEAK FREE CONNECTION
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REQUIRES 75% FEWER TOOL MOVEMENTS BY THE INSTALLERS
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75% FEWER MOVEMENTS MAKES IT 75% SAFER
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DOESN'T RELY ON TORQUE COMPARED TO ASME PCC-1 LEGACY
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REPEATABLE AND ACCURATE WITH MINIMAL TRAINING AND LIMITED EXPERIENCE
Single Pass Kit Installation
Product Specifications
Kits clearly labeled and individually packaged to maintain set and improve ease of installation. Simple visual instructions included.
Products
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CLASS 300 SERIES
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CLASS 600 SERIES
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NPS (in) ABT kit # Lb. Per Kit Stud Dia. (In) # DTIs/kit Instructions 3 ABT-3300B7SWSS50BP .86 3/4 8 
4 ABT-4300B7SWSS50BP .86 3/4 8 6 ABT-6300B7SWSS50BP 1.30 3/4 12 8 ABT-8300B7SWSS50BP 1.89 7/8 12 10 ABT-10300B7SWSS50BP 3.38 1 16 12 ABT-12300B7SWSS50BP 4.07 1 1/8 16 14 ABT-14300B7SWSS50BP 5.09 1 1/8 20 16 ABT-16300B7SWSS50BP 6.21 1 1/4 20 18 ABT-18300B7SWSS50BP 7.45 1 1/4 24 20 ABT-20300B7SWSS50BP 7.45 1 1/4 24 Example Part Number: ABT-3300B7SWSS50BP
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- ↳Nominal Pipe Diameter
- 300
- ↳Flange Class
- B7
- ↳Stud Type
- SWSS
- ↳Gasket Type
- 50
- ↳Target Gasket Stress
- BP
- ↳Finish
3 – 3” Nom. Pipe Size
300 – Flange Class
B7 – Stud
SWSS – Dual Ring Spiral Wound Stainless Steel Gasket
50 – 50 KSI Stud Stress
BP – Plain Coated Carbon SteelDuraSquirt® Flange Systems are only designed to be used with:
- ASME B16.20 Dual ring spiral wound gaskets, Camprofile Gaskets with Outer Rings, or Camprofile Gaskets with Inner and Outer Rings.
- ASME B16.5 & ASTM A105 weld neck, raised faced flanges: WeldNeck, Socket Weld, Threaded, and Blind
- ASTM A193 B7, A320 L7 and B7M studs.
Each DTI kit is composed of the same number of DTIs as there are bolts in the flange. Kits should be ordered in the same quantity and at the same time as gaskets.
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NPS (in) ABT kit # Lb. Per Kit Stud Dia. (In) # DTIs/kit Instructions 3 ABT-3600B7SWSS50BP .86 3/4 8 4 ABT-4600B7SWSS50BP 1.26 7.8 8 6 ABT-6600B7SWSS50BP 2.54 1 12 8 ABT-8600B7SWSS50BP 3.05 1 1/8 12 10 ABT-10600B7SWSS50BP 4.97 1 1/4 16 12 ABT-12600B7SWSS50BP 6.21 1 1/4 20 14 ABT-14600B7SWSS50BP 7.56 1 3/8 20 16 ABT-16600B7SWSS50BP 9.00 1 1/2 20 Example Part Number: ABT-3600B7SWSS50BP
- 3
- ↳Nominal Pipe Diameter
- 600
- ↳Flange Class
- B7
- ↳Stud Type
- SWSS
- ↳Gasket Type
- 50
- ↳Target Gasket Stress
- BP
- ↳Finish
3 – 3” Nom. Pipe Size
600 – Flange Class
B7 – Stud
SWSS – Dual Ring Spiral Wound Stainless Steel Gasket
50 – 50 KSI Stud Stress
BP – Plain Coated Carbon Steel
DuraSquirt® Flange Systems are only designed to work with:
1. ASME B16.20 Dual ring spiral wound gaskets.
2. ASME B16.5 & ASTM A105 weld neck, raised face flanges.
3. ASTM A193 B7 studs.
Each DTI kit is composed of the same number of DTIs as there are bolts in the flange. Kits should be ordered in the same quantity and at the same time as gaskets
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1 Bibel, G. D. and Ezell, R.M. “An Improved Flange Bolt-Up Procedure Using Experimentally Determined Elastic Interaction Coefficients,”
