Thermoacoustic stack-section spools: 2 in × 48.65, 58.65 and 68.65 mm (fabrication spec) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/thermoacoustic-stack-section-spools/  (CC BY 4.0)
Basis: Fabrication specs on standard 2 in ferrules (ISO 2852 faces as gen_hardware draws them, BPE tube Ø50.8 × 1.65); length = stack + ambient exchanger 10 + end spacer 9.8 + Type B lip 0.55 − 1.7 (the stack stands 1.7 into the hot joint's flat ring)
Catalog version: 2026-10-20

Sizes: see table below
- A plain 2 in clamp × clamp spool, ordered from a sanitary fabricator to length, that makes the stack its own section: the stack stands on the hot exchanger in the section below, through the hot joint's flat ring; the ambient exchanger sits on the stack; an 8.4 spacer runs from the exchanger to the Type B gasket lip at the top face. Nothing is welded inside.
- The length is set so the column fits exactly: stack + 10 + 9.8 + 0.55 − 1.7. The ambient exchanger then sits 10.35–20.35 below the top face, so the 14 mm water jacket clamps over it at 9.35 mm from the face, clear of the joint's clamp.
- Spec line: '2 in × L mm clamp × clamp spool, tube Ø50.8 × 1.65, two standard 2 in ferrules'. The lower end runs at the hot exchanger's temperature: the builder checks the spool, the ring and the clamp at that temperature.

spool  face_to_face_mm  stack  stack_mm  ambient_exchanger_mm  end_spacer_mm  jacket_from_lower_face_mm
spool-2in-48.65mm  48.64999999999999  stack-spiral-2in-30-g1.0  30  10.0  9.8  25.3
spool-2in-58.65mm  58.64999999999999  stack-spiral-2in-40-g1.0  40  10.0  9.8  35.3
spool-2in-68.65mm  68.64999999999999  stack-spiral-2in-50-g1.0  50  10.0  9.8  45.3

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- ISO (via iTeh sample): ISO 2852 clamp liners: face profile and flange / groove diameters — PDF — standard excerpt; dimensions are facts — https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf
- ASME: BPE Bioprocessing Equipment (tube OD and wall, clamp fittings) — standard — ASME; dimensions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/bpe-bioprocessing-equipment
- Xem Studio: tools/gen_ta_modular.py: the section geometry, the network model and every number on these pages — code — CC BY 4.0 — https://xemstudio.com/
- Long Earth Society: Engine builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/thermoacoustic-stack-section-spools/index.json
API: https://xemstudio.com/api/geometry?object=thermoacoustic-stack-section-spools