Hammer Union Set, 40 Series, NPT × NPT, 400 psi, Standard Service

The Hammer Union Set, 40 Series, NPT × NPT, 400 psi, Standard Service is a complete wing-union (hammer-union) set comprising a Male sub, a Female sub, and a hand-tightened wing nut for hammer-tightened assembly. The 40 series is the lowest cold-working-pressure hammer union in the WECO-style range — designed for general air, water, oil, and gas service in atmospheric and low-pressure manifolding. Rated for 400 psi working pressure in standard service. Standard service rated for clean hydrocarbon, completion fluid, water, brine, oil, and gas streams within the working-pressure envelope.

Construction

• Type: Hammer Union Set (Male sub + Female sub + wing nut)
• Series: 40 (N/A pressure class)
• End A: NPT (Male sub)
• End B: NPT (Female sub)
• Auxiliary: Hand-tight wing nut included; elastomer gasket sold separately
• Material: Forged carbon / alloy steel — ASTM A105 below 6,000 psi, AISI 4130 at 6,000 psi and above; tempered
• Temperature rating: -20°F to 250°F (-29°C to 121°C)
• Charpy-tested impact-energy reports available on request

Available sizes

Stock or short-lead nominal sizes: 1 in, 1-1/2 in, 2 in, 3 in, 4 in. Other sizes within the same series can be sourced build-to-order at typical 8–14 week mill lead times. Indus quotes a firm size, pressure class, end-connection style, and service-class match against your inquiry data sheet — call or RFQ with the line specification and we will return a complete matched bill of materials.

Performance

Cold working pressure 400 psi (N/A class), standard rated. Bodies are forged from ASTM A105 carbon steel (AISI 4130 alloy steel available on request) and tempered to the working-pressure design. Hydrostatic test at 1.5× shell pressure on every unit. Mill test reports per EN 10204 3.1 / 3.2 supplied with each shipment. Charpy V-notch impact testing available where service requires low-temperature toughness verification.

Applications

• Bulk water and brine transfer at atmospheric pressure
• Low-pressure compressed-air manifolds
• Light oil and gas line couplings
• Yard / shop temporary line connections

OEM equivalents and compatibility

This product is supplied as a recognised matched-pressure interchange for the following OEM standards and product lines (no implied authorised-distributor relationship — supplied by Indus Hydraulics):

• FMC WECO Figure 40
• Anson 40
• SPM 40
• OPI 40

Compliance

• ASTM A105 carbon steel forging — AISI 4130 alloy steel available on request
• Recognised oilfield wing-union design lineage — pressure-class methodology and hydrostatic testing aligned with API 6A practice
• EN 10204 3.1 / 3.2 mill test reports
• Hydrostatic test certificates per unit (1.5× shell pressure)
• Charpy V-notch impact testing on request
• Full traceability — heat number stamped on body

How to order

Confirm on your RFQ: (a) exact nominal size and bore ID, (b) line working pressure and pressure class, (c) end-connection style on each port (NPT thread, butt-weld, integral / non-pressure thread sealing end), (d) service class — sour (NACE MR0175) or standard, (e) any auxiliary requirement (charpy testing report, low-temperature certification), and (f) destination port for door-to-door logistics. Indus quotes ex-Dubai with full traceability.

Companion products

Pair with matched-pressure crossover unions, integral crosses / tees / elbows, swivel joints, pup joints, and adapter flanges of the same WECO figure class. For the higher-pressure frac series (1502 / 2202), also specify API 6A flanges, ring-joint gaskets, and BSL stud-and-nut sets in the matched pressure class. Hammer-union gaskets (Buna-N, Viton, HSN, FFKM) are sold separately — confirm fluid chemistry to match elastomer.