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Lock Seam Pipe Forming through Rolled Sheet Metal

Chicago Metal Rolled Products has been rolling sheet metal since 1908 including forming lock seam pipe.  Today the company uses new, specialized equipment for sheet metal rolling of lock seam pipe.

We produce straight-seam, lock seam pipe (as opposed to spiral lock seam pipe.)  The lock seam, which is very strong, is made by first edging the material by bending one side of the end of the pipe down and bending the other side up.  The two ends are then rolled into a cylinder where the edges interlock with each other.  The edges are then mechanically locked by applying pressure along the length of the seam.  The resultant seam is stronger than the parent material.  (The designation "LFQ" or "lock-forming quality" indicates that a given grade of steel could withstand being formed as a lock seam.)

Lock Seam Pipe Capacities:

Thickness Diameter Max Length
Lock-Seam Pipe 16-24 gauge 3 to 14 inch 10 ft.
Welded Pipe 12-18 gauge 3 to 48 inch 12 ft.
Cylinder Segments 12-28 gauge      3 to any diameter 12 ft.

 

Chicago Metal lock seam pipe can be made in lengths up to 10 feet.  The company can also form the 10 foot lengths to a diameter as small as 3 inches and can be made from galvanized sheet, carbon sheet, stainless sheet and painted steel.  

Lock Seam Pipe Value-Added Services

Lock seam pipe can be welded or bolted end to end with angle rings provided by Chicago Metal.  A Van Stone flange can be made by slipping an angle ring over the pipe, cutting back the seam, say, a half inch, and then flaring the ends of the pipe.  The resultant seal is excellent.  We can provide advice on how any given project can be done best including quoting alternatives to lock seam pipe like welded pipe.

Lock Seam Pipe Applications

Lock seam pipe has a number of applications including serving as component parts of dust collection systems.  Chicago Metal has provided pipe, elbows, angle rings, hangars, glast gates, clamp bands and other component parts for such systems for decades.

This pipe is commonly used for metal duct work and for pneumatic conveying of material.  Round ductwork has superior conveying capacity to square and rectangular ductwork.  Straight seam lock seam pipe is superior to spiral lock seam pipe in oil mist applications because the former is less likely to leak when the seam is located on the top of the pipe run.  Lock seam pipe is also used for downspouts, especially on commercial buildings.

Contact us for more information on lock seam pipe.

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Our work TESTIMONIALS
  • "A big thank you to your team. Your parts are receiving the most positive feedback possible. Your company has new fans here."
    Bruce E., Kansas
  • "Without CMRP able to roll these channels to my specifications, there was no way this beautiful round antenna would have ever worked. 
    Damon S., Wisconsin
  • "My customer has installed several truckloads worth of 36" x 160# WF beams you rolled and cambered for us. The quality is spot on."
    Justin J., Alabama
  • "The rolled stringers were right on the button as far as pitch and radius."
    Bob O., Illinois
  • "I really appreciate your company coming through on this order & expediting the material when you said you would.You stick by their word."
    Jason R., Missouri
  • "The last order of rings were the best that we have received from you. The flanges were all flat. Keep them coming like that."
    Lenny P., Ohio
  • "Thanks for OVER AND ABOVE EXCELLENT SERVICE.  The quality and accuracy of CMRP's work is outstanding"
    Peggy, Texas
  • "The ring looks good! The OD is dead on. Thank you for your concerns regarding our questions and responding so quickly. I was impressed!"
    Fran Z., Pennsylvania
  • "Please pass on to the workers, . . . (your) rings . . . were some of the best our fitter has seen."
    Jeff K., Illinois
  • "I want to thank CMRP for exceeding what you promised. You are ahead of schedule and the strakes are fitting great."
    Jim A., New York
  • "Your advice was a significant contribution to the project.  You provide excellent service and knowledge"
    John Z., Illinois
  • "These pipes were rolled DEAD ON. The shop guys said they had never seen a pipe come in and hit every point like that in a long long time."
    Joe C., Missouri
  • "The rolling on these rectangular tubes was absolutely perfect! Barely any adjustment needed to be made."
    Tom G., Massachusetts
  • “We just placed an order for Rolled Angle Rings & you delivered them to us within 2-1/2 days ... we are three states away.”
    Jim S., Pennsylvania
  • “I would like a quote on a spiral project. I have heard many good things about your quality and timeliness from other fabricators.”
    Ryan L., Utah
  • “The rolled beams were delivered yesterday and look very good. Thank you for great service!”
    Thomas S., Maine
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    Mindy, H., Indiana
  • “It is unbelievable how good a job you guys did rolling these beams.”
    Richard G., Canada
  • “You all helped us out greatly when no one else seemed they could. Everything worked out wonderfully!”
    Cliff P., Florida
  • “The parts are very impressive and the service was stellar. I will certainly be recommending you to anyone needing such services.”
    Randy W., Georgia
  • “We got everything we needed in a very short turnaround, I appreciate it.  We are happy to have a reliable source to turn to.”
    Russell P., Illinois
  • “Quote was great! Timely, appropriate, and frankly less money than we expected.”
    James L., New York
  • “CMRP immediately took action and shipped out my order the same day! This all happened like clockwork, allowing us to meet the deadline.”
    Margo R., Ohio
  • “We only use CMRP for our rolling needs. We can always depend on getting a finished product that is to our expectations or better.”
    David P., New York
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    Will F., Indiana
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    Jessica, South Carolina
  • “On larger more complex rolling items, I typically only go to Chicago Metal Rolled Products for pricing due to quality.”
    Kevin H., Pennsylvania
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    Brad, Iowa
  • “We really appreciate your work on this. Amazing attention for a smaller sized job. Thank you for coming through.”
    Erik J., New York
  • “The project was AMAZING! Thank you so much for your help. I really do appreciate it. Always a pleasure doing business with you.”
    Kelly E., Iowa
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    Mark R., Maryland
  • “Thank you for your help with the project and for getting everything complete and shipped out in a such a timely fashion. You guys saved the day.”
    Ben B., Florida
  • “You guys did an amazing job on these stringers. We would NOT be having such a success story without your team's effort & patience!”
    David B., Oklahoma
  • “You gave me excellent service and help which I appreciated very much. Material was on time and right on spec.”
    Brian S., Pennsylvania
  • “Your positive attitude is noted & CMRP reputation in the steel industry is impressive. All of our locations will contact you in the future.”
    Dave B., North Carolina
  • “My boilermakers in the field had positive things to say about the quality and accuracy of the angles that you rolled. Thank you.”
    Walter L., New York
  • “The project is complete and our customer is very pleased. I appreciate your diligence and quality on this one.”
    Dusty A., Texas
  • “CMRP has been instrumental in our ability to deliver high quality & great looking parts. Any job, big or small, CMRP has come through.”
    Eddie C., Kansas
  • “Your rolled steel worked great! We check lengths & chord dimensions ...everything was within an 1/8".”
    Don L., Michigan
  • “We received our order on time and the level of workmanship is excellent!"
    Roger R., Georgia
  • “Your company did a great job rolling these parts. Our fab and installation is going very well thanks to the quality of your work."
    Ronnie S., North Carolina
  • “Your company is the only one that was able to give me a quote that was right on with my specs, everyone else had to modify at least one dimension."
    Adam S., Minnesota
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    Don F., Nevada
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    Rick N., Minnesota
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    Lance B., Minnesota
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    Jonathan S., New York
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    Lane K., Florida
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    Alyson M., Texas
  • “The rolled segments were perfect and priced right. We will definitely use you again."
    Joe M., Nebraska
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    Tammie N., Kansas
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    Walt W., Florida
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    Jeff L., Pennsylvania
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    Brian W., Iowa
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    David C., New York
  • “Your work, as always, near perfect, timely, and accurate. Exactly the same for the last 40 years."
    Pat M., Wisconsin
  • “Absolutely fantastic job by your guys! The fit of the two parts in AWESOME!"
    Kenny R., Florida
  • “The other guys were off by 3/4", CMRP spot on. We won't even question where to send our rolled plates in the future."
    Brant M., Illinois
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    Jay W., Minnesota
  • “I always appreciate your continual positive attitude even in some difficult situations."
    Christopher L., Illinois
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    Rodney H., Virginia
  • “What an amazing first time experience!! Couldn't be happier!."
    Jason S., Indiana
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    Andre T., Missouri
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    Jim R., Illinois
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    Dan P., New York
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    Dan M., Texas
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    Jim M., New York
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