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Concrete Pipe Manufacturing

NAICS 327332 · Nonmetallic Mineral Product Manufacturing · SBA size standard: 750 employees

Concrete pipe manufacturers produce precast concrete pipe, culverts and manholes using forms, reinforcement cages, concrete mixes and curing processes. Daily work converts customer orders for specific diameters, lengths, joint types and strengths into production schedules, raw material orders, cage fabrication, pouring, curing and delivery. The plant maintains forms, mix designs, reinforcement inventory and quality test records while meeting engineering specifications and local DOT or municipal requirements that the owner confirms.

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What makes this business different

  • Custom pipe orders with exact diameter, length, wall thickness, joint style, reinforcement and strength class that must match approved submittals
  • Heavy forms and cages that require crane or forklift handling and dedicated production bays
  • Batch mixing and pouring schedules dictated by concrete set times, cure cycles and yard space
  • Raw materials including cement, aggregates, rebar or wire mesh and admixtures kept at safe stock levels with moisture and temperature monitoring
  • Quality testing for compression, absorption and joint integrity with documented break reports
  • Delivery of heavy pipe using specialized trailers with loading sequences that respect weight limits and site access
  • Maintenance of steel forms, headers, pallets and vibration equipment to prevent defects
  • Tracking of mix designs, cure times, heat or steam curing logs and chain-of-custody for each production run

Specialist bots

  • a worker at a steel desk reviewing large rolled drawings and order sheets next to a row of concrete pipe samples in a plant office

    Order and Submittal Reviewer

    Convert incoming orders and specifications into production-ready tasks with accurate dimensions and requirements.

    Works in: Ambitious Tasks, Ambitious Docs, Contract Analyzer · Workflows: Order and submittal review

    Automates

    • Reads order documents and extracts diameter, length, joint, class and delivery needs
    • Compares specs against approved product capabilities
    • Drafts submittal packages with drawings and mix references
    • Creates the master order task for the plant

    Stops for a person

    • Engineering or owner approves any non-standard requests or deviations
    • Final submittals are reviewed and stamped by a person before sending
  • a worker standing in a concrete pipe plant updating a large wall calendar showing form assignments and pour dates

    Production Scheduler

    Assign forms, bays and pour dates to orders while balancing capacity and curing space.

    Works in: Ambitious Sheets, Ambitious Tasks · Workflows: Production scheduling and form assignment

    Automates

    • Groups orders by diameter to reduce form changes
    • Assigns steel forms and production lanes
    • Calculates concrete and cage quantities needed
    • Builds the weekly pour calendar

    Stops for a person

    • The plant manager adjusts the schedule for weather or urgent orders
    • Owner confirms delivery dates before locking the plan
  • a worker measuring a circular steel reinforcement cage on a jig inside a rebar fabrication shop with benders and cutters nearby

    Reinforcement Cage Fabricator

    Generate cutting lists, bending schedules and assembly instructions for steel cages that meet each pipe specification.

    Works in: Ambitious Sheets, Ambitious Docs, Ambitious Tasks · Workflows: Reinforcement cage fabrication

    Automates

    • Creates rebar cut and bend lists from order dimensions
    • Calculates required circumferential and longitudinal steel
    • Produces cage tags and assembly notes
    • Withdraws correct rebar inventory

    Stops for a person

    • Welder or cage builder checks final dimensions before release
    • Any change to reinforcement requires engineering approval
  • a worker checking aggregate moisture with a probe and updating batch weights on a clipboard beside a concrete mixer

    Materials and Batching Coordinator

    Calculate and order raw materials and generate daily batch tickets adjusted for current stock and moisture.

    Works in: Ambitious Sheets, Ambitious Tasks, Process Optimizer · Workflows: Raw material ordering and batching

    Automates

    • Computes cement, aggregate and admixture quantities from mix designs
    • Subtracts silo and yard inventory
    • Adjusts for aggregate moisture readings
    • Produces batch tickets and purchase lists

    Stops for a person

    • Plant manager places all material orders and approves spending
    • Batch operator verifies actual weights before mixing
  • a worker using a compression testing machine on a concrete cylinder sample in a materials testing lab with pipe sections visible outside

    Quality Testing Technician

    Create test schedules, record results and compile documentation showing each pipe meets the required strength and absorption.

    Works in: Ambitious Tasks, Ambitious Docs, Ambitious Sheets · Workflows: Quality testing and documentation, Pouring, curing and stripping

    Automates

    • Generates compression and absorption test schedules
    • Logs break results and cylinder identifications
    • Flags failing pipe for review
    • Compiles traceability reports for each run

    Stops for a person

    • Laboratory or owner reviews and signs all test reports
    • Decisions to accept or reject pipe are made by people
  • a worker directing a forklift loading large concrete pipe sections onto a flatbed trailer in the plant yard

    Shipping and Dispatch Planner

    Organize loading sequences, draft bills of lading and track delivery of finished pipe to job sites.

    Works in: Ambitious Tasks, Ambitious Docs · Workflows: Shipping, loading and delivery

    Automates

    • Groups shipments by delivery location and weight
    • Determines safe loading order for trailers
    • Creates bills of lading with pipe markings
    • Tracks delivery status and returns

    Stops for a person

    • Driver and yard crew confirm load securement before departure
    • All shipping documents are approved by a person before release
  • a worker inspecting the inside surface of a large steel pipe form with a flashlight and cleaning tools in the maintenance bay of a concrete plant

    Form and Equipment Maintenance Coordinator

    Track form condition, generate maintenance checklists and schedule repairs to keep production equipment ready.

    Works in: Ambitious Tasks, Ambitious Sheets, Ambitious Docs · Workflows: Form and equipment maintenance

    Automates

    • Generates post-strip cleaning and inspection checklists
    • Tracks maintenance intervals for forms, vibrators and cranes
    • Logs defects and schedules repairs
    • Maintains spare parts inventory for form components

    Stops for a person

    • Maintenance technician performs and signs off on all repairs
    • Plant manager approves any replacement of major form components

Workflows

Order and submittal review

Starts when: New customer order or request for quote arrives by email or portal

  1. Extract diameter, length, joint type, strength class, quantity and delivery date from the order
  2. Compare specifications against approved product list and mix designs
  3. Draft submittal package with shop drawings, mix design and test history
  4. Flag any non-standard requirements for engineering review
  5. Create a production-ready order task with all dimensions and notes

Watch for: Joint styles and reinforcement must match exactly what the engineer specified; Any deviation requires written approval before production begins

Production scheduling and form assignment

Starts when: Approved orders and weekly capacity check

  1. Group orders by pipe diameter and joint type to minimize form changes
  2. Assign available steel forms and production bays for the week
  3. Calculate required concrete volume, reinforcement and cage count
  4. Schedule pour times accounting for set time and cure cycle
  5. Reserve curing space and mark delivery dates on the yard calendar

Watch for: Forms must be cleaned, oiled and reassembled between sizes; Curing time varies with weather and mix design

Reinforcement cage fabrication

Starts when: One day before scheduled pour

  1. Pull rebar or wire mesh specifications from the order task
  2. Generate cutting list and bending schedule for each cage diameter and length
  3. Draft welding or tying instructions for longitudinal and circumferential steel
  4. Create inventory withdrawal for raw rebar stock
  5. Produce cage identification tags that travel with the pipe

Watch for: Cage diameter must allow proper concrete cover per specification; Overlap and weld quality affect structural performance

Raw material ordering and batching

Starts when: After schedule is locked and daily before first pour

  1. Calculate total cement, aggregate, sand and admixture quantities from mix designs
  2. Subtract current silo and stockpile inventory
  3. Draft purchase orders for upcoming concrete and rebar needs
  4. Generate daily batch tickets with exact weights and water-cement ratios
  5. Track moisture content adjustments for aggregates

Watch for: Aggregate moisture changes daily and must be measured; Cement and admixtures have shelf-life limits

Pouring, curing and stripping

Starts when: Morning of each scheduled production day

  1. Generate pre-pour checklist for form condition, cage placement, vibration equipment and safety
  2. Produce batch tickets and log actual weights and slump
  3. Create curing schedule with temperature and time targets
  4. Track when each pipe can be stripped and moved to yard storage
  5. Record test cylinder identification for each pour

Watch for: Proper vibration prevents honeycombing; Cure time must be met before forms can be stripped

Quality testing and documentation

Starts when: After curing and on test schedule

  1. Generate test schedule for compression, absorption and joint integrity
  2. Record break results and calculate average strength
  3. Flag any pipe that fails specification for rework or scrap
  4. Compile test reports tied to each production run
  5. Maintain traceability logs for each pipe segment

Watch for: Test cylinders must be cured under same conditions as the pipe; Owner reviews and signs all test reports before release

Shipping, loading and delivery

Starts when: When pipe is cured, tested and customer requests shipment

  1. Group orders by delivery address and trailer weight limits
  2. Create loading sequence to match crane or forklift capability at site
  3. Draft bill of lading with piece count, weights and identification numbers
  4. Generate delivery tickets and driver instructions
  5. Track returned or refused loads and update inventory

Watch for: Pipe is heavy and must be loaded to avoid rolling or cracking; Jobsite access and offloading method affect sequence

Form and equipment maintenance

Starts when: After each use and on scheduled dates

  1. Generate post-strip checklist for cleaning, oiling, inspection and repair of forms, headers and pallets
  2. Track vibration equipment, cranes and forklift maintenance intervals
  3. Log defects found in forms that could cause pipe surface issues
  4. Schedule rebuild or replacement of worn form components
  5. Update inventory of spare parts and consumables such as form ties and release agents

Watch for: Form condition directly determines pipe finish quality and rejection rate; Maintenance must be completed between production runs to avoid delays

Bot templates for this industry

Source: U.S. Small Business Administration, Office of Size Standards, Table of Small Business Size Standards Matched to North American Industry Classification System Codes, version March 2023 (effective 2023-03-17, NAICS 2022). Size standards are shown for reference only.