314.822.0500 sales@tridentsteel.com


Downloads & Forms

OCTG - Line Sheet

New API 5CT Production Tubing and Casing specifications & details.

Line Pipe - Line Sheet

API 5L X52 PSL-2 ERW specifications & details.

Poly Pipe - Line Sheet

HDPE Poly Pipe specifications & Details

Trident Steel Brochure

Download our brochure for a quick reference of our products, processing/threading/end finishing & coating options, stocking locations, and contact information.

Credit Application

Please complete the attached form in its entirety. Email the completed application to Catherine Schoeffler at  or fax to 314-984-8700.


Barlow’s Formula

Barlow's Forumula

Barlow’s Formula is an equation which shows the relationship of internal pressure, allowable stress, nominal thickness and diameter. To determine bursting pressure of line pipe, use this formula. Trident Steel offers ERW line pipe from international and domestic mills. To find out more, contact us today.

  • P = ID pressure (psi)
  • S = Material strength (psi) *Minimum yield strength*
  • T = Wall thickness (in)
  • OD = Outside Diameter (in) *Must be a decimal*
  • SF = Safety factor (generally 1.5 – 10, 1 for collapsing pressure)

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Corporate Office

1650 Des Peres Road
Suite 100
St. Louis, MO 63131