APP-TEE

APP Type TEE

Products / Couplings / APP Type TEE

Safe Branching and Line Division in Pipelines: APP Type Engineering

APP Tee Connection Fittings are designed to provide fast, practical, and secure branching at any required angle or to split pipelines into two directions. Thanks to their wide tolerance design, they enable branching while simultaneously connecting different types of pipes within a single solution.

KEY ADVANTAGES

  • Provides pipeline branching and pipe connection in a single body without additional fittings
  • Allows branching from various pipe materials (Ductile iron, Cast iron, AC, PVC, PE, GRP, etc.)
  • Ideal solution for branching at junction points between different pipe materials
  • Absorbs angular deviations up to 6° and accommodates ground movement
  • Expansion and contraction tolerance up to 10 mm
  • Fast installation under harsh site conditions, reducing labor costs
  • Cost-effective solution reducing stock variety
Download Product Data Sheet Download Installation Instructions Download Size Chart
  • Potable water transmission and distribution pipelines
  • Industrial pipeline systems
  • Treatment plants and pumping stations
  • New pipeline branch connections
  • Valve and equipment connections
  • Flow meter and instrumentation installations
  • Fire hydrant and equipment connections
  • Integration of pipelines made from different materials

This instruction has been prepared for the safe and leak-tight installation of wide-tolerance APP Type Tees used to create branch outlets from different pipe materials (Ductile iron, Cast iron, Steel, PVC, PE, GRP, AC, etc.).

  1. Pre-Installation Preparation
  • Product Check:
    Verify the label information on the Tee fitting (DN size and tolerance range) and ensure it is suitable for the outer diameters of the pipes to be connected.
  • Pipe Cutting:
    Cut the pipes perpendicular (approx. 90°) to the pipe axis. Uneven cuts may prevent proper seating of the sealing gasket.
  • Surface Cleaning:
    Clean rust, dirt, scale, and old coatings from the pipe ends using a wire brush.
    The surface in contact with the sealing gasket must be smooth and clean.
  • Chamfering (If Required):
    Apply an external chamfer of approximately 30° to the pipe ends if necessary.
    This prevents damage to the gasket during insertion.
  1. Positioning and Marking
  • Insertion Depth Marking:
    Measure the body length of the adaptor sections at both ends of the Tee.
    Mark reference lines on the pipes according to the adaptor insertion lengths.
  • Pipe Alignment:
    Align both pipes as accurately as possible.
    APP Type Tees can typically accommodate up to ±6° angular deviation; however, straight alignment is recommended for optimal performance.
  1. Installation Steps
  • Lubrication:
    Apply a silicone-based lubricant suitable for potable water to the sealing gasket and pipe ends.
    (Do not use oil-based lubricants as they may damage the gasket.)
  • Placement:
    With the adaptor sections loosened, slide the Tee fitting onto the first pipe.
    Bring the second pipe into position and insert it into the adaptor section up to the marked reference line.
  • Gap Control:
    Ensure a gap of at least 5–10 mm between the pipe ends and the end of the Tee adaptor section to allow for thermal expansion and settlement.
  1. Tightening Procedure (Critical Step)
  • Cross Tightening:
    Tighten the bolts in a diagonal/crosswise sequence (e.g., 12–6 o’clock, 3–9 o’clock).
    This ensures even load distribution on the gasket.
  • Gradual Tightening:
    First hand-tighten all bolts, then tighten gradually in multiple passes using a wrench.
  1. Outlet Connection

Depending on the outlet type:

  • Flanged Connection:
    Align the flanged equipment with the flanged outlet of the APP Type Tee.
    Insert a standard flange gasket between the flanges.
    Install the bolts and nuts, then tighten them gradually in multiple passes.
  • Adaptor Connection:
    Loosen all bolts of the outlet adaptor.
    After completing the preparation steps described in Sections 1, 2, and 3, insert the pipe into the adaptor up to the marked reference line.
    Carefully complete the tightening procedure described in Section 4.
  1. Final Check and Testing
  • Visual Inspection:
    Ensure that the gap between the pressure flanges and the adaptor body is uniform around the entire circumference.
  • Pressure Test:
    Perform a low-pressure leak test before commissioning the pipeline.
    If leakage is detected, recheck and retighten the bolts.

SAFETY NOTES

  • Wear protective gloves and safety footwear during installation.
  • For large-diameter Tee fittings, use pipe supports or blocking elements to prevent excessive load on the adaptor.
  • Ensure that the protective coating of bolts (galvanized, Dacromet, etc.) is not damaged to maintain corrosion resistance.

No

Component Name

Material and Technical Details

1

Adaptor Tee

ST 37 Steel. High-strength structural body.

2

End Rings

Ductile Iron (GGG40/50) / ST 37 Steel. Pressure end caps applying force to the gasket.

3

Flange

Zinc-Coated ST 37 Çelik. Compatible with various flange standards

4

Tee Bolts/Bolts

Zinc-Coated Grade 8.8 Steel / AISI 304 / 316 Stainless Steel. High corrosion resistance.

5

Conical Gasket

EPDM / NBR. Pressure-responsive sealing technology.

6

Nuts and Washers

Zinc-Coated Grade 8.8 Steel / AISI 304 / 316 Stainless Steel. Secure locking system.

7

Coating

Epoxy / Thermoplastic. Long-lasting protection and durability.
REFERENCE DIAMETER (mm) APP CODE COMPATIBLE PIPE TYPES (mm) TAPPING DIAMETER (mm.)
50 APP 50 50 Steel, 63 HDPE, 63 PVC 32, 40
80 APP 80/1 80 GRP (PN 10), 80 Steel, 90 PVC, 90 HDPE, 80 Ductile, 80 CI 32, 40, 50, 65, 80
APP 80/2 80 GRP (PN 10), 110 PVC, 110 HDPE  32, 40, 50, 65, 80
100 APP 100 110 PVC, 110 HDPE, 100 GRP (PN 10), 100 CI, 100 Steel, 100 Ductile 32, 40, 50, 65, 80, 100
125 APP 125 125 GRP (PN 10), 140 PVC, 140 HDPE, 125 Steel, 125 CI, 125 Ductile 65, 100, 125
150 APP 150/1 160 PVC, 160 HDPE, 150 Steel 65, 80, 100, 125, 150
APP 150/2 160 PVC, 160 HDPE, 180 PVC, 180 HDPE, 150 Steel, 150 CI, 150 Ductile, 150 GRP (PN 10), 65, 80, 100, 125, 150
APP 150/3 150 GRP (PN 12,5), PN12,5, 200 HDPE, 200 PVC 65, 80, 100, 125, 150
175 APP 175 175 GRP (PN 10), 200 Steel 65, 80, 100, 125, 150
200 APP 200/1 225 PVC, 225 HDPE, 200 Steel, 200 Ductile 80, 100, 125, 150, 200
APP 200/2 200 GRP (PN10), 225 PVC, 225 HDPE, 200 Ductile, 200 CI 80, 100, 125, 150, 200
APP 200/3 200 GRP, (PN 12,5) PN 12,5, 250 PVC, 250 HDPE 80, 100, 125, 150, 200
250 APP 250/1 250 Ductile, 250 Steel, 250 CI 80, 100, 125, 150, 200, 250
APP 250/2 250 GRP (PN 10), 280 PVC, 280 HDPE 80, 100, 125, 150, 200, 250
APP 250/3 250 GRP (PN 12,5) 80, 100, 125, 150, 200, 250
300 APP 300/1 315 PVC, 315 HDPE, 300 CI, 300 Steel, 300 Ductile 80, 100, 125, 150, 200, 250, 300
APP 300/2 300 Ductile, 300 GRP (PN 5) 80, 100, 125, 150, 200, 250, 300
APP 300/3 300 GRP (PN 10), 355 PVC, 355 HDPE, 350 Steel 80, 100, 125, 150, 200, 250, 300
350 APP 350/1 300 GRP (PN12,5), 350 Ductile, 350 CI, GRP (PN 15) 100, 125, 150, 200, 250, 300, 350
APP 350/2 350 GRP (PN 10), 400 PVC, 400 HDPE, 400 Steel 100, 125, 150, 200, 250, 300, 350
400 APP 400/1 400 Ductile, 400 CI, 400 GRP 100, 125, 150, 200, 250, 300, 350, 400
APP 400/2 400 GRP (PN 10), 450 PVC, 450 HDPE, 450 Steel 100, 125, 150, 200, 250, 300, 350, 400
500 APP 500/1 500 Steel, 500 HDPE, 500 PVC, 450 GRP (PN 10) 100, 125, 150, 200, 250, 300, 350, 400, 500
APP 500/2 500 Ductile, 500 CI, 500 GRP 100, 125, 150, 200, 250, 300, 350, 400, 500
APP 500/3 500 GRP (PN 10), 560 PVC, 560 HDPE 100, 125, 150, 200, 250, 300, 350, 400, 500
600 APP 600/1 600 Steel, 500 GRP (PN15) 100, 125, 150, 200, 250, 300, 350, 400, 500, 600
APP 600/2 600 Ductile, 600 CI, 630 PVC, 630 HDPE, 600 GRP 100, 125, 150, 200, 250, 300, 350, 400, 500, 600
APP 600/3 600 GRP (PN 10), 600 GRP (PN12,5) 100, 125, 150, 200, 250, 300, 350, 400, 500, 600
700 APP 700 GRP, Steel, Ductile, GRP, PE, CI 100, 125, 150, 200, 250, 300, 350, 400, 500, 600, 700
800 APP 800 GRP, Steel, Ductile, GRP, PE, CI 100, 125, 150, 200, 250, 300, 350, 400, 500, 600, 700, 800
900 APP 900 GRP, Steel, Ductile, GRP, PE, CI 100, 125, 150, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900
1000 APP 1000 GRP, Steel, Ductile, GRP, PE, CI 100, 125, 150, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000
1200 APP 1200 Steel, Ductile, GRP, PE 100, 125, 150, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000
1400 APP 1400 Steel, Ductile, GRP, PE 100, 125, 150, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000
1600 APP 1600 Steel, Ductile, GRP, PE 100, 125, 150, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000
1600-3400 APP1600-3400 Steel, Ductile, GRP 100, 125, 150, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000
Please specify the length and model number when ordering:
          1. Model: Both ends with adapters, outlet with adapter
          2. Model: Both ends with adapters, outlet with flange
          3. Model:One end with adapter, one end with flange, outlet with adapter
          4. Model:One end with adapter, one end with flange, outlet with flange
          5. Model: Both ends with flanges, outlet with adapter
          6. Model:Both ends with flanges, outlet with flange
Please specify the pressure classes of the flanges when ordering.
Custom production is available for pipe diameters not listed.
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