The Best Way To Bolt!

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 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

  • SIGNIFICANTLY FASTER THAN THE ASME PCC-1 LEGACY BY 70+%

  • RELIABLY PRODUCES A LEAK FREE CONNECTION

  • REQUIRES 75% FEWER TOOL MOVEMENTS BY THE INSTALLERS

  • 75% FEWER MOVEMENTS MAKES IT 75% SAFER

  • DOESN'T RELY ON TORQUE COMPARED TO ASME PCC-1 LEGACY

  • REPEATABLE AND ACCURATE WITH MINIMAL TRAINING AND LIMITED EXPERIENCE

University of Houston Independent Evaluation

Single Pass Kit Installation

DuraSquirt Flange Bolting
Single Pass Flange System
Flange Bolting 101

Product Specifications

Kits clearly labeled and individually packaged to maintain set and improve ease of installation. Simple Visual instructions included.

Box for DuraSquirt® Single Pass Flange System with two pieces from kit
Open box for DuraSquirt® Single Pass Flange System with installation instructions

Products

  • CLASS 300 SERIES
  • CLASS 600 SERIES
  • 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

    • 3
      • ↳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 Steel

    DuraSquirt® Flange Systems are only designed to be used with:

    1. ASME B16.20 Dual ring spiral wound gaskets, Camprofile Gaskets with Outer Rings, or Camprofile Gaskets with Inner and Outer Rings.
    2. ASME B16.5 & ASTM A105 weld neck, raised faced flanges: WeldNeck, Socket Weld, Threaded, and Blind
    3. ASTM A193 B7, A320 L7 and B7M studs.
    4. 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.

  • 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

1 Bibel, G. D. and Ezell, R.M. “An Improved Flange Bolt-Up Procedure Using Experimentally Determined Elastic Interaction Coefficients,”

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